Bump version to 0.0.205

I previously tried adding the #[test_case()] attribute macro and got
confused because the Rust compilation suddenly failed with:

    error[E0658]: use of unstable library feature 'custom_test_frameworks': custom test frameworks are an unstable feature

which is a quite confusing error message.  The solution is to just add
`use test_case::test_case;`, so this commit adds that line to the
example in CONTRIBUTING.md to spare others this source of confusion.

.github/workflows/ci.yaml

@@ -40,8 +40,7 @@ jobs:
       - run: git diff --quiet README.md || echo "::error file=README.md::This file is outdated. Run 'cargo +nightly dev generate-all'."
       - run: git diff --quiet src/checks_gen.rs || echo "::error file=src/checks_gen.rs::This file is outdated. Run 'cargo +nightly dev generate-all'."
       - run: git diff --quiet ruff.schema.json || echo "::error file=ruff.schema.json::This file is outdated. Run 'cargo +nightly dev generate-all'."
-      - run: git diff --quiet playground/src/ruff_options.ts || echo "::error file=playground/src/ruff_options.ts::This file is outdated. Run 'cargo +nightly dev generate-all'."
-      - run: git diff --exit-code -- README.md src/checks_gen.rs ruff.schema.json playground/src/ruff_options.ts
+      - run: git diff --exit-code -- README.md src/checks_gen.rs ruff.schema.json
 
   cargo-fmt:
     name: "cargo fmt"
@@ -118,7 +117,17 @@ jobs:
             ${{ runner.os }}-build-
             ${{ runner.os }}-
       - run: pip install black[d]==22.12.0
-      - run: cargo test --all
+      - name: Run tests
+        run: |
+          export INSTA_SNAPSHOT_REFERENCES_FILE="$(mktemp)"
+          cargo test --all
+          USED_SNAPSHOTS=$(cat $INSTA_SNAPSHOT_REFERENCES_FILE | xargs realpath --relative-to $PWD)
+          UNUSED_SNAPSHOTS=$(cat <(git ls-files '*.snap') <(echo "$USED_SNAPSHOTS") | sort | uniq -u)
+          if [ ! -z "$UNUSED_SNAPSHOTS" ]; then
+            echo "Found unused snapshots:"
+            echo "$UNUSED_SNAPSHOTS"
+            exit 1
+          fi
       - run: cargo test --package ruff --test black_compatibility_test -- --ignored
 
 # TODO(charlie): Re-enable the `wasm-pack` tests.

.pre-commit-config.yaml

@@ -1,6 +1,6 @@
 repos:
   - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.200
+    rev: v0.0.205
     hooks:
       - id: ruff
 

CONTRIBUTING.md

@@ -66,11 +66,13 @@ understand how other, similar rules are implemented.
 To add a test fixture, create a file under `resources/test/fixtures`, named to match the `CheckCode`
 you defined earlier (e.g., `E402.py`). This file should contain a variety of violations and
 non-violations designed to evaluate and demonstrate the behavior of your lint rule. Run Ruff locally
-with (e.g.) `cargo run resources/test/fixtures/E402.py --no-cache`. Once you're satisfied with the
+with (e.g.) `cargo run resources/test/fixtures/E402.py --no-cache --select E402`. Once you're satisfied with the
 output, codify the behavior as a snapshot test by adding a new `testcase` macro to the `mod tests`
 section of `src/linter.rs`, like so:
 
 ```rust
+use test_case::test_case;
+
 #[test_case(CheckCode::A001, Path::new("A001.py"); "A001")]
 ...
 ```

Cargo.lock

@@ -750,7 +750,7 @@ checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"
 
 [[package]]
 name = "flake8-to-ruff"
-version = "0.0.200-dev.0"
+version = "0.0.205-dev.0"
 dependencies = [
  "anyhow",
  "clap 4.0.32",
@@ -1878,7 +1878,7 @@ dependencies = [
 
 [[package]]
 name = "ruff"
-version = "0.0.200"
+version = "0.0.205"
 dependencies = [
  "annotate-snippets 0.9.1",
  "anyhow",
@@ -1946,7 +1946,7 @@ dependencies = [
 
 [[package]]
 name = "ruff_dev"
-version = "0.0.200"
+version = "0.0.205"
 dependencies = [
  "anyhow",
  "clap 4.0.32",
@@ -1967,7 +1967,7 @@ dependencies = [
 
 [[package]]
 name = "ruff_macros"
-version = "0.0.200"
+version = "0.0.205"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2010,7 +2010,7 @@ dependencies = [
 [[package]]
 name = "rustpython-ast"
 version = "0.1.0"
-source = "git+https://github.com/RustPython/RustPython.git?rev=68d26955b3e24198a150315e7959719b03709dee#68d26955b3e24198a150315e7959719b03709dee"
+source = "git+https://github.com/RustPython/RustPython.git?rev=8cb2b8292062adf13bde1b863a9b02c9f0bda3dd#8cb2b8292062adf13bde1b863a9b02c9f0bda3dd"
 dependencies = [
  "num-bigint",
  "rustpython-common",
@@ -2020,7 +2020,7 @@ dependencies = [
 [[package]]
 name = "rustpython-common"
 version = "0.0.0"
-source = "git+https://github.com/RustPython/RustPython.git?rev=68d26955b3e24198a150315e7959719b03709dee#68d26955b3e24198a150315e7959719b03709dee"
+source = "git+https://github.com/RustPython/RustPython.git?rev=8cb2b8292062adf13bde1b863a9b02c9f0bda3dd#8cb2b8292062adf13bde1b863a9b02c9f0bda3dd"
 dependencies = [
  "ascii",
  "cfg-if 1.0.0",
@@ -2043,7 +2043,7 @@ dependencies = [
 [[package]]
 name = "rustpython-compiler-core"
 version = "0.1.2"
-source = "git+https://github.com/RustPython/RustPython.git?rev=68d26955b3e24198a150315e7959719b03709dee#68d26955b3e24198a150315e7959719b03709dee"
+source = "git+https://github.com/RustPython/RustPython.git?rev=8cb2b8292062adf13bde1b863a9b02c9f0bda3dd#8cb2b8292062adf13bde1b863a9b02c9f0bda3dd"
 dependencies = [
  "bincode",
  "bitflags",
@@ -2060,7 +2060,7 @@ dependencies = [
 [[package]]
 name = "rustpython-parser"
 version = "0.1.2"
-source = "git+https://github.com/RustPython/RustPython.git?rev=68d26955b3e24198a150315e7959719b03709dee#68d26955b3e24198a150315e7959719b03709dee"
+source = "git+https://github.com/RustPython/RustPython.git?rev=8cb2b8292062adf13bde1b863a9b02c9f0bda3dd#8cb2b8292062adf13bde1b863a9b02c9f0bda3dd"
 dependencies = [
  "ahash",
  "anyhow",

Cargo.toml

@@ -6,7 +6,7 @@ members = [
 
 [package]
 name = "ruff"
-version = "0.0.200"
+version = "0.0.205"
 authors = ["Charlie Marsh <charlie.r.marsh@gmail.com>"]
 edition = "2021"
 rust-version = "1.65.0"
@@ -51,11 +51,11 @@ path-absolutize = { version = "3.0.14", features = ["once_cell_cache", "use_unix
 quick-junit = { version = "0.3.2" }
 regex = { version = "1.6.0" }
 ropey = { version = "1.5.0", features = ["cr_lines", "simd"], default-features = false }
-ruff_macros = { version = "0.0.200", path = "ruff_macros" }
+ruff_macros = { version = "0.0.205", path = "ruff_macros" }
 rustc-hash = { version = "1.1.0" }
-rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "68d26955b3e24198a150315e7959719b03709dee" }
-rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "68d26955b3e24198a150315e7959719b03709dee" }
-rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "68d26955b3e24198a150315e7959719b03709dee" }
+rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "8cb2b8292062adf13bde1b863a9b02c9f0bda3dd" }
+rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "8cb2b8292062adf13bde1b863a9b02c9f0bda3dd" }
+rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "8cb2b8292062adf13bde1b863a9b02c9f0bda3dd" }
 schemars = { version = "0.8.11" }
 semver = { version = "1.0.16" }
 serde = { version = "1.0.147", features = ["derive"] }

LICENSE

@@ -388,6 +388,31 @@ are:
     SOFTWARE.
   """
 
+- flake8-implicit-str-concat, licensed as follows:
+  """
+    The MIT License (MIT)
+
+    Copyright (c) 2019 Dylan Turner
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+    THE SOFTWARE.
+  """
+
 - flake8-import-conventions, licensed as follows:
   """
     MIT License

README.md

@@ -44,6 +44,7 @@ Ruff is extremely actively developed and used in major open-source projects like
 - [Bokeh](https://github.com/bokeh/bokeh)
 - [Zulip](https://github.com/zulip/zulip)
 - [Pydantic](https://github.com/pydantic/pydantic)
+- [Sphinx](https://github.com/sphinx-doc/sphinx)
 - [Hatch](https://github.com/pypa/hatch)
 - [Jupyter](https://github.com/jupyter-server/jupyter_server)
 - [Synapse](https://github.com/matrix-org/synapse)
@@ -94,6 +95,7 @@ of [Conda](https://docs.conda.io/en/latest/):
    1. [flake8-comprehensions (C4)](#flake8-comprehensions-c4)
    1. [flake8-debugger (T10)](#flake8-debugger-t10)
    1. [flake8-errmsg (EM)](#flake8-errmsg-em)
+   1. [flake8-implicit-str-concat (ISC)](#flake8-implicit-str-concat-isc)
    1. [flake8-import-conventions (ICN)](#flake8-import-conventions-icn)
    1. [flake8-print (T20)](#flake8-print-t20)
    1. [flake8-quotes (Q)](#flake8-quotes-q)
@@ -167,7 +169,7 @@ Ruff also works with [pre-commit](https://pre-commit.com):
 ```yaml
 - repo: https://github.com/charliermarsh/ruff-pre-commit
   # Ruff version.
-  rev: 'v0.0.200'
+  rev: 'v0.0.205'
   hooks:
     - id: ruff
       # Respect `exclude` and `extend-exclude` settings.
@@ -298,6 +300,7 @@ ruff path/to/code/ --select F401 --select F403
 
 See `ruff --help` for more:
 
+<!-- Begin auto-generated cli help. -->
 ```shell
 Ruff: An extremely fast Python linter.
 
@@ -328,11 +331,11 @@ Options:
   -n, --no-cache
           Disable cache reads
       --select <SELECT>
-          List of error codes to enable
+          Comma-separated list of error codes to enable (or ALL, to enable all checks)
       --extend-select <EXTEND_SELECT>
           Like --select, but adds additional error codes on top of the selected ones
       --ignore <IGNORE>
-          List of error codes to ignore
+          Comma-separated list of error codes to disable
       --extend-ignore <EXTEND_IGNORE>
           Like --ignore, but adds additional error codes on top of the ignored ones
       --exclude <EXCLUDE>
@@ -347,6 +350,10 @@ Options:
           List of mappings from file pattern to code to exclude
       --format <FORMAT>
           Output serialization format for error messages [possible values: text, json, junit, grouped, github, gitlab]
+      --stdin-filename <STDIN_FILENAME>
+          The name of the file when passing it through stdin
+      --cache-dir <CACHE_DIR>
+          Path to the cache directory
       --show-source
           Show violations with source code
       --respect-gitignore
@@ -355,12 +362,6 @@ Options:
           Enforce exclusions, even for paths passed to Ruff directly on the command-line
       --update-check
           Enable or disable automatic update checks
-      --show-files
-          See the files Ruff will be run against with the current settings
-      --show-settings
-          See the settings Ruff will use to check a given Python file
-      --add-noqa
-          Enable automatic additions of noqa directives to failing lines
       --dummy-variable-rgx <DUMMY_VARIABLE_RGX>
           Regular expression matching the name of dummy variables
       --target-version <TARGET_VERSION>
@@ -368,18 +369,23 @@ Options:
       --line-length <LINE_LENGTH>
           Set the line-length for length-associated checks and automatic formatting
       --max-complexity <MAX_COMPLEXITY>
-          Max McCabe complexity allowed for a function
-      --stdin-filename <STDIN_FILENAME>
-          The name of the file when passing it through stdin
+          Maximum McCabe complexity allowed for a given function
+      --add-noqa
+          Enable automatic additions of `noqa` directives to failing lines
+      --clean
+          Clear any caches in the current directory or any subdirectories
       --explain <EXPLAIN>
           Explain a rule
-      --cache-dir <CACHE_DIR>
-          Path to the cache directory
+      --show-files
+          See the files Ruff will be run against with the current settings
+      --show-settings
+          See the settings Ruff will use to check a given Python file
   -h, --help
           Print help information
   -V, --version
           Print version information
 ```
+<!-- End auto-generated cli help. -->
 
 ### `pyproject.toml` discovery
 
@@ -539,7 +545,7 @@ For more, see [Pyflakes](https://pypi.org/project/pyflakes/2.5.0/) on PyPI.
 | F621 | ExpressionsInStarAssignment | Too many expressions in star-unpacking assignment |  |
 | F622 | TwoStarredExpressions | Two starred expressions in assignment |  |
 | F631 | AssertTuple | Assert test is a non-empty tuple, which is always `True` |  |
-| F632 | IsLiteral | Use `==` and `!=` to compare constant literals | 🛠 |
+| F632 | IsLiteral | Use `==` to compare constant literals | 🛠 |
 | F633 | InvalidPrintSyntax | Use of `>>` is invalid with `print` function |  |
 | F634 | IfTuple | If test is a tuple, which is always `True` |  |
 | F701 | BreakOutsideLoop | `break` outside loop |  |
@@ -552,7 +558,6 @@ For more, see [Pyflakes](https://pypi.org/project/pyflakes/2.5.0/) on PyPI.
 | F821 | UndefinedName | Undefined name `...` |  |
 | F822 | UndefinedExport | Undefined name `...` in `__all__` |  |
 | F823 | UndefinedLocal | Local variable `...` referenced before assignment |  |
-| F831 | DuplicateArgumentName | Duplicate argument name in function definition |  |
 | F841 | UnusedVariable | Local variable `...` is assigned to but never used |  |
 | F842 | UnusedAnnotation | Local variable `...` is annotated but never used |  |
 | F901 | RaiseNotImplemented | `raise NotImplemented` should be `raise NotImplementedError` | 🛠 |
@@ -572,7 +577,7 @@ For more, see [pycodestyle](https://pypi.org/project/pycodestyle/2.9.1/) on PyPI
 | E714 | NotIsTest | Test for object identity should be `is not` | 🛠 |
 | E721 | TypeComparison | Do not compare types, use `isinstance()` |  |
 | E722 | DoNotUseBareExcept | Do not use bare `except` |  |
-| E731 | DoNotAssignLambda | Do not assign a lambda expression, use a def | 🛠 |
+| E731 | DoNotAssignLambda | Do not assign a `lambda` expression, use a `def` | 🛠 |
 | E741 | AmbiguousVariableName | Ambiguous variable name: `...` |  |
 | E742 | AmbiguousClassName | Ambiguous class name: `...` |  |
 | E743 | AmbiguousFunctionName | Ambiguous function name: `...` |  |
@@ -657,7 +662,7 @@ For more, see [pyupgrade](https://pypi.org/project/pyupgrade/3.2.0/) on PyPI.
 | ---- | ---- | ------- | --- |
 | UP001 | UselessMetaclassType | `__metaclass__ = type` is implied | 🛠 |
 | UP003 | TypeOfPrimitive | Use `str` instead of `type(...)` | 🛠 |
-| UP004 | UselessObjectInheritance | Class `...` inherits from object | 🛠 |
+| UP004 | UselessObjectInheritance | Class `...` inherits from `object` | 🛠 |
 | UP005 | DeprecatedUnittestAlias | `assertEquals` is deprecated, use `assertEqual` | 🛠 |
 | UP006 | UsePEP585Annotation | Use `list` instead of `List` for type annotations | 🛠 |
 | UP007 | UsePEP604Annotation | Use `X \| Y` for type annotations | 🛠 |
@@ -671,12 +676,13 @@ For more, see [pyupgrade](https://pypi.org/project/pyupgrade/3.2.0/) on PyPI.
 | UP015 | RedundantOpenModes | Unnecessary open mode parameters | 🛠 |
 | UP016 | RemoveSixCompat | Unnecessary `six` compatibility usage | 🛠 |
 | UP017 | DatetimeTimezoneUTC | Use `datetime.UTC` alias | 🛠 |
-| UP018 | NativeLiterals | Unnecessary call to `str` and `bytes` | 🛠 |
+| UP018 | NativeLiterals | Unnecessary call to `str` | 🛠 |
 | UP019 | TypingTextStrAlias | `typing.Text` is deprecated, use `str` | 🛠 |
 | UP020 | OpenAlias | Use builtin `open` | 🛠 |
 | UP021 | ReplaceUniversalNewlines | `universal_newlines` is deprecated, use `text` | 🛠 |
 | UP022 | ReplaceStdoutStderr | Sending stdout and stderr to pipe is deprecated, use `capture_output` | 🛠 |
 | UP023 | RewriteCElementTree | `cElementTree` is deprecated, use `ElementTree` | 🛠 |
+| UP025 | RewriteUnicodeLiteral | Remove unicode literals from strings | 🛠 |
 
 ### pep8-naming (N)
 
@@ -852,6 +858,16 @@ For more, see [flake8-errmsg](https://pypi.org/project/flake8-errmsg/0.4.0/) on
 | EM102 | FStringInException | Exception must not use an f-string literal, assign to variable first |  |
 | EM103 | DotFormatInException | Exception must not use a `.format()` string directly, assign to variable first |  |
 
+### flake8-implicit-str-concat (ISC)
+
+For more, see [flake8-implicit-str-concat](https://pypi.org/project/flake8-implicit-str-concat/0.3.0/) on PyPI.
+
+| Code | Name | Message | Fix |
+| ---- | ---- | ------- | --- |
+| ISC001 | SingleLineImplicitStringConcatenation | Implicitly concatenated string literals on one line |  |
+| ISC002 | MultiLineImplicitStringConcatenation | Implicitly concatenated string literals over continuation line |  |
+| ISC003 | ExplicitStringConcatenation | Explicitly concatenated string should be implicitly concatenated |  |
+
 ### flake8-import-conventions (ICN)
 
 | Code | Name | Message | Fix |
@@ -907,6 +923,7 @@ For more, see [flake8-tidy-imports](https://pypi.org/project/flake8-tidy-imports
 
 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
+| TID251 | BannedApi | `...` is banned: ... |  |
 | TID252 | BannedRelativeImport | Relative imports are banned |  |
 
 ### flake8-unused-arguments (ARG)
@@ -1000,7 +1017,7 @@ For more, see [Pylint](https://pypi.org/project/pylint/2.15.7/) on PyPI.
 | ---- | ---- | ------- | --- |
 | RUF001 | AmbiguousUnicodeCharacterString | String contains ambiguous unicode character '𝐁' (did you mean 'B'?) | 🛠 |
 | RUF002 | AmbiguousUnicodeCharacterDocstring | Docstring contains ambiguous unicode character '𝐁' (did you mean 'B'?) | 🛠 |
-| RUF003 | AmbiguousUnicodeCharacterComment | Comment contains ambiguous unicode character '𝐁' (did you mean 'B'?) |  |
+| RUF003 | AmbiguousUnicodeCharacterComment | Comment contains ambiguous unicode character '𝐁' (did you mean 'B'?) | 🛠 |
 | RUF004 | KeywordArgumentBeforeStarArgument | Keyword argument `...` must come after starred arguments |  |
 | RUF100 | UnusedNOQA | Unused blanket `noqa` directive | 🛠 |
 
@@ -1271,10 +1288,12 @@ natively, including:
 - [`flake8-docstrings`](https://pypi.org/project/flake8-docstrings/)
 - [`flake8-eradicate`](https://pypi.org/project/flake8-eradicate/)
 - [`flake8-errmsg`](https://pypi.org/project/flake8-errmsg/)
+- [`flake8-implicit-str-concat`](https://pypi.org/project/flake8-implicit-str-concat/)
 - [`flake8-import-conventions`](https://github.com/joaopalmeiro/flake8-import-conventions)
 - [`flake8-print`](https://pypi.org/project/flake8-print/)
 - [`flake8-quotes`](https://pypi.org/project/flake8-quotes/)
 - [`flake8-return`](https://pypi.org/project/flake8-return/)
+- [`flake8-simplify`](https://pypi.org/project/flake8-simplify/) (1/37)
 - [`flake8-super`](https://pypi.org/project/flake8-super/)
 - [`flake8-tidy-imports`](https://pypi.org/project/flake8-tidy-imports/) (1/3)
 - [`isort`](https://pypi.org/project/isort/)
@@ -1326,10 +1345,12 @@ Today, Ruff can be used to replace Flake8 when used with any of the following pl
 - [`flake8-docstrings`](https://pypi.org/project/flake8-docstrings/)
 - [`flake8-eradicate`](https://pypi.org/project/flake8-eradicate/)
 - [`flake8-errmsg`](https://pypi.org/project/flake8-errmsg/)
+- [`flake8-implicit-str-concat`](https://pypi.org/project/flake8-implicit-str-concat/)
 - [`flake8-import-conventions`](https://github.com/joaopalmeiro/flake8-import-conventions)
 - [`flake8-print`](https://pypi.org/project/flake8-print/)
 - [`flake8-quotes`](https://pypi.org/project/flake8-quotes/)
 - [`flake8-return`](https://pypi.org/project/flake8-return/)
+- [`flake8-simplify`](https://pypi.org/project/flake8-simplify/) (1/37)
 - [`flake8-super`](https://pypi.org/project/flake8-super/)
 - [`flake8-tidy-imports`](https://pypi.org/project/flake8-tidy-imports/) (1/3)
 - [`mccabe`](https://pypi.org/project/mccabe/)
@@ -1651,7 +1672,6 @@ Summary
 
 <!-- Sections automatically generated by `cargo dev generate-options`. -->
 <!-- Begin auto-generated options sections. -->
-
 #### [`allowed-confusables`](#allowed-confusables)
 
 A list of allowed "confusable" Unicode characters to ignore when
@@ -2477,6 +2497,27 @@ ban-relative-imports = "all"
 
 ---
 
+#### [`banned-api`](#banned-api)
+
+Specific modules or module members that may not be imported or accessed.
+Note that this check is only meant to flag accidental uses,
+and can be circumvented via `eval` or `importlib`.
+
+**Default value**: `{}`
+
+**Type**: `HashMap<String, BannedApi>`
+
+**Example usage**:
+
+```toml
+[tool.ruff.flake8-tidy-imports]
+[tool.ruff.flake8-tidy-imports.banned-api]
+"cgi".msg = "The cgi module is deprecated, see https://peps.python.org/pep-0594/#cgi."
+"typing.TypedDict".msg = "Use typing_extensions.TypedDict instead."
+```
+
+---
+
 ### `flake8-unused-arguments`
 
 #### [`ignore-variadic-names`](#ignore-variadic-names)

flake8_to_ruff/Cargo.lock

@@ -771,7 +771,7 @@ checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"
 
 [[package]]
 name = "flake8_to_ruff"
-version = "0.0.200"
+version = "0.0.205"
 dependencies = [
  "anyhow",
  "clap",
@@ -1975,7 +1975,7 @@ dependencies = [
 
 [[package]]
 name = "ruff"
-version = "0.0.200"
+version = "0.0.205"
 dependencies = [
  "anyhow",
  "bincode",

flake8_to_ruff/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "flake8-to-ruff"
-version = "0.0.200-dev.0"
+version = "0.0.205-dev.0"
 edition = "2021"
 
 [lib]

flake8_to_ruff/src/converter.rs

@@ -164,17 +164,17 @@ pub fn convert(
                 // flake8-quotes
                 "quotes" | "inline-quotes" | "inline_quotes" => match value.trim() {
                     "'" | "single" => flake8_quotes.inline_quotes = Some(Quote::Single),
-                    "\"" | "double" => flake8_quotes.inline_quotes = Some(Quote::Single),
+                    "\"" | "double" => flake8_quotes.inline_quotes = Some(Quote::Double),
                     _ => eprintln!("Unexpected '{key}' value: {value}"),
                 },
                 "multiline-quotes" | "multiline_quotes" => match value.trim() {
                     "'" | "single" => flake8_quotes.multiline_quotes = Some(Quote::Single),
-                    "\"" | "double" => flake8_quotes.multiline_quotes = Some(Quote::Single),
+                    "\"" | "double" => flake8_quotes.multiline_quotes = Some(Quote::Double),
                     _ => eprintln!("Unexpected '{key}' value: {value}"),
                 },
                 "docstring-quotes" | "docstring_quotes" => match value.trim() {
                     "'" | "single" => flake8_quotes.docstring_quotes = Some(Quote::Single),
-                    "\"" | "double" => flake8_quotes.docstring_quotes = Some(Quote::Single),
+                    "\"" | "double" => flake8_quotes.docstring_quotes = Some(Quote::Double),
                     _ => eprintln!("Unexpected '{key}' value: {value}"),
                 },
                 "avoid-escape" | "avoid_escape" => match parser::parse_bool(value.as_ref()) {

flake8_to_ruff/src/plugin.rs

@@ -16,16 +16,17 @@ pub enum Plugin {
     Flake8Datetimez,
     Flake8Debugger,
     Flake8Docstrings,
-    Flake8ErrMsg,
     Flake8Eradicate,
+    Flake8ErrMsg,
+    Flake8ImplicitStrConcat,
     Flake8Print,
     Flake8Quotes,
     Flake8Return,
     Flake8Simplify,
     Flake8TidyImports,
     McCabe,
-    PandasVet,
     PEP8Naming,
+    PandasVet,
     Pyupgrade,
 }
 
@@ -45,6 +46,7 @@ impl FromStr for Plugin {
             "flake8-docstrings" => Ok(Plugin::Flake8Docstrings),
             "flake8-eradicate" => Ok(Plugin::Flake8Eradicate),
             "flake8-errmsg" => Ok(Plugin::Flake8ErrMsg),
+            "flake8-implicit-str-concat" => Ok(Plugin::Flake8ImplicitStrConcat),
             "flake8-print" => Ok(Plugin::Flake8Print),
             "flake8-quotes" => Ok(Plugin::Flake8Quotes),
             "flake8-return" => Ok(Plugin::Flake8Return),
@@ -76,14 +78,15 @@ impl fmt::Debug for Plugin {
                 Plugin::Flake8Docstrings => "flake8-docstrings",
                 Plugin::Flake8Eradicate => "flake8-eradicate",
                 Plugin::Flake8ErrMsg => "flake8-errmsg",
+                Plugin::Flake8ImplicitStrConcat => "flake8-implicit-str-concat",
                 Plugin::Flake8Print => "flake8-print",
                 Plugin::Flake8Quotes => "flake8-quotes",
                 Plugin::Flake8Return => "flake8-return",
                 Plugin::Flake8Simplify => "flake8-simplify",
                 Plugin::Flake8TidyImports => "flake8-tidy-imports",
                 Plugin::McCabe => "mccabe",
-                Plugin::PandasVet => "pandas-vet",
                 Plugin::PEP8Naming => "pep8-naming",
+                Plugin::PandasVet => "pandas-vet",
                 Plugin::Pyupgrade => "pyupgrade",
             }
         )
@@ -106,6 +109,7 @@ impl Plugin {
             // TODO(charlie): Handle rename of `E` to `ERA`.
             Plugin::Flake8Eradicate => CheckCodePrefix::ERA,
             Plugin::Flake8ErrMsg => CheckCodePrefix::EM,
+            Plugin::Flake8ImplicitStrConcat => CheckCodePrefix::ISC,
             Plugin::Flake8Print => CheckCodePrefix::T2,
             Plugin::Flake8Quotes => CheckCodePrefix::Q,
             Plugin::Flake8Return => CheckCodePrefix::RET,
@@ -146,6 +150,7 @@ impl Plugin {
             }
             Plugin::Flake8Eradicate => vec![CheckCodePrefix::ERA],
             Plugin::Flake8ErrMsg => vec![CheckCodePrefix::EM],
+            Plugin::Flake8ImplicitStrConcat => vec![CheckCodePrefix::ISC],
             Plugin::Flake8Print => vec![CheckCodePrefix::T2],
             Plugin::Flake8Quotes => vec![CheckCodePrefix::Q],
             Plugin::Flake8Return => vec![CheckCodePrefix::RET],
@@ -449,6 +454,7 @@ pub fn infer_plugins_from_codes(codes: &BTreeSet<CheckCodePrefix>) -> Vec<Plugin
         Plugin::Flake8Docstrings,
         Plugin::Flake8Eradicate,
         Plugin::Flake8ErrMsg,
+        Plugin::Flake8ImplicitStrConcat,
         Plugin::Flake8Print,
         Plugin::Flake8Quotes,
         Plugin::Flake8Return,

playground/.prettierignore

@@ -1 +0,0 @@
-src/ruff_options.ts

playground/.prettierrc.json

@@ -0,0 +1,3 @@
+{
+  "trailingComma": "all"
+}

playground/index.html

@@ -17,6 +17,14 @@
   </head>
   <body>
     <div id="root"></div>
+    <div style="display: flex; position: fixed; right: 16px; bottom: 16px">
+      <a href="https://GitHub.com/charliermarsh/ruff"
+        ><img
+          src="https://img.shields.io/github/stars/charliermarsh/ruff.svg?style=social&label=GitHub&maxAge=2592000&?logoWidth=100"
+          alt="GitHub stars"
+          style="width: 120px"
+      /></a>
+    </div>
     <script type="module" src="/src/main.tsx"></script>
   </body>
 </html>

playground/src/Editor/Editor.tsx

@@ -1,12 +1,13 @@
 import { useCallback, useEffect, useState } from "react";
-import { persist, restore } from "./config";
-import { DEFAULT_CONFIG_SOURCE, DEFAULT_PYTHON_SOURCE } from "../constants";
+import { DEFAULT_PYTHON_SOURCE } from "../constants";
+import init, { check, Check, currentVersion, defaultSettings } from "../pkg";
 import { ErrorMessage } from "./ErrorMessage";
 import Header from "./Header";
-import init, { check, current_version, Check } from "../pkg";
+import { useTheme } from "./theme";
+import { persist, restore, stringify } from "./settings";
 import SettingsEditor from "./SettingsEditor";
 import SourceEditor from "./SourceEditor";
-import Themes from "./Themes";
+import MonacoThemes from "./MonacoThemes";
 
 type Tab = "Source" | "Settings";
 
@@ -15,17 +16,18 @@ export default function Editor() {
   const [version, setVersion] = useState<string | null>(null);
   const [tab, setTab] = useState<Tab>("Source");
   const [edit, setEdit] = useState<number>(0);
-  const [configSource, setConfigSource] = useState<string | null>(null);
+  const [settingsSource, setSettingsSource] = useState<string | null>(null);
   const [pythonSource, setPythonSource] = useState<string | null>(null);
   const [checks, setChecks] = useState<Check[]>([]);
   const [error, setError] = useState<string | null>(null);
+  const [theme, setTheme] = useTheme();
 
   useEffect(() => {
     init().then(() => setInitialized(true));
   }, []);
 
   useEffect(() => {
-    if (!initialized || configSource == null || pythonSource == null) {
+    if (!initialized || settingsSource == null || pythonSource == null) {
       return;
     }
 
@@ -33,7 +35,7 @@ export default function Editor() {
     let checks: Check[];
 
     try {
-      config = JSON.parse(configSource);
+      config = JSON.parse(settingsSource);
     } catch (e) {
       setChecks([]);
       setError((e as Error).message);
@@ -49,73 +51,85 @@ export default function Editor() {
 
     setError(null);
     setChecks(checks);
-  }, [initialized, configSource, pythonSource]);
-
-  useEffect(() => {
-    if (configSource == null || pythonSource == null) {
-      const payload = restore();
-      if (payload) {
-        const [configSource, pythonSource] = payload;
-        setConfigSource(configSource);
-        setPythonSource(pythonSource);
-      } else {
-        setConfigSource(DEFAULT_CONFIG_SOURCE);
-        setPythonSource(DEFAULT_PYTHON_SOURCE);
-      }
-    }
-  }, [configSource, pythonSource]);
+  }, [initialized, settingsSource, pythonSource]);
 
   useEffect(() => {
     if (!initialized) {
       return;
     }
 
-    setVersion(current_version());
-  }, [initialized]);
+    if (settingsSource == null || pythonSource == null) {
+      const payload = restore();
+      if (payload) {
+        const [settingsSource, pythonSource] = payload;
+        setSettingsSource(settingsSource);
+        setPythonSource(pythonSource);
+      } else {
+        setSettingsSource(stringify(defaultSettings()));
+        setPythonSource(DEFAULT_PYTHON_SOURCE);
+      }
+    }
+  }, [initialized, settingsSource, pythonSource]);
 
-  const handleShare = useCallback(() => {
-    if (!initialized || configSource == null || pythonSource == null) {
+  useEffect(() => {
+    if (!initialized) {
       return;
     }
 
-    persist(configSource, pythonSource);
-  }, [initialized, configSource, pythonSource]);
+    setVersion(currentVersion());
+  }, [initialized]);
+
+  const handleShare = useCallback(() => {
+    if (!initialized || settingsSource == null || pythonSource == null) {
+      return;
+    }
+
+    persist(settingsSource, pythonSource);
+  }, [initialized, settingsSource, pythonSource]);
 
   const handlePythonSourceChange = useCallback((pythonSource: string) => {
     setEdit((edit) => edit + 1);
     setPythonSource(pythonSource);
   }, []);
 
-  const handleConfigSourceChange = useCallback((configSource: string) => {
+  const handleSettingsSourceChange = useCallback((settingsSource: string) => {
     setEdit((edit) => edit + 1);
-    setConfigSource(configSource);
+    setSettingsSource(settingsSource);
   }, []);
 
   return (
-    <main className={"h-full w-full flex flex-auto"}>
+    <main
+      className={
+        "h-full w-full flex flex-auto bg-ayu-background dark:bg-ayu-background-dark"
+      }
+    >
       <Header
         edit={edit}
-        version={version}
         tab={tab}
-        onChange={setTab}
+        theme={theme}
+        version={version}
+        onChangeTab={setTab}
+        onChangeTheme={setTheme}
         onShare={initialized ? handleShare : undefined}
       />
 
-      <Themes />
+      <MonacoThemes />
 
       <div className={"mt-12 relative flex-auto"}>
-        {initialized && configSource != null && pythonSource != null ? (
+        {initialized && settingsSource != null && pythonSource != null ? (
           <>
             <SourceEditor
               visible={tab === "Source"}
               source={pythonSource}
+              theme={theme}
               checks={checks}
               onChange={handlePythonSourceChange}
             />
             <SettingsEditor
               visible={tab === "Settings"}
-              source={configSource}
-              onChange={handleConfigSourceChange}
+              source={settingsSource}
+              theme={theme}
+              onChange={handleSettingsSourceChange}
             />
           </>
         ) : null}

playground/src/Editor/ErrorMessage.tsx

@@ -18,7 +18,7 @@ export function ErrorMessage({ children }: { children: string }) {
           children.startsWith("Error: ")
             ? children.slice("Error: ".length)
             : children,
-          120
+          120,
         )}
       </p>
     </div>

playground/src/Editor/Header.tsx

@@ -1,26 +1,50 @@
 import classNames from "classnames";
+import ThemeButton from "./ThemeButton";
 import ShareButton from "./ShareButton";
+import { Theme } from "./theme";
 import VersionTag from "./VersionTag";
 
 export type Tab = "Source" | "Settings";
 
 export default function Header({
   edit,
-  version,
   tab,
-  onChange,
+  theme,
+  version,
+  onChangeTab,
+  onChangeTheme,
   onShare,
 }: {
   edit: number;
-  version: string | null;
   tab: Tab;
-  onChange: (tab: Tab) => void;
+  theme: Theme;
+  version: string | null;
+  onChangeTab: (tab: Tab) => void;
+  onChangeTheme: (theme: Theme) => void;
   onShare?: () => void;
 }) {
   return (
     <div
-      className="w-full flex items-center justify-between flex-none pl-5 sm:pl-6 pr-4 lg:pr-6 absolute z-10 top-0 left-0 -mb-px antialiased border-b border-gray-200 dark:border-gray-800"
-      style={{ background: "#f8f9fa" }}
+      className={classNames(
+        "w-full",
+        "flex",
+        "items-center",
+        "justify-between",
+        "flex-none",
+        "pl-5",
+        "sm:pl-6",
+        "pr-4",
+        "lg:pr-6",
+        "absolute",
+        "z-10",
+        "top-0",
+        "left-0",
+        "-mb-px",
+        "antialiased",
+        "border-b",
+        "border-gray-200",
+        "dark:border-gray-800",
+      )}
     >
       <div className="flex space-x-5">
         <button
@@ -28,15 +52,15 @@ export default function Header({
           className={classNames(
             "relative flex py-3 text-sm leading-6 font-semibold focus:outline-none",
             tab === "Source"
-              ? "text-ayu"
-              : "text-gray-700 hover:text-gray-900 focus:text-gray-900 dark:text-gray-300 dark:hover:text-white"
+              ? "text-ayu-accent"
+              : "text-gray-700 hover:text-gray-900 focus:text-gray-900 dark:text-gray-300 dark:hover:text-white",
           )}
-          onClick={() => onChange("Source")}
+          onClick={() => onChangeTab("Source")}
         >
           <span
             className={classNames(
-              "absolute bottom-0 inset-x-0 bg-ayu h-0.5 rounded-full transition-opacity duration-150",
-              tab === "Source" ? "opacity-100" : "opacity-0"
+              "absolute bottom-0 inset-x-0 bg-ayu-accent h-0.5 rounded-full transition-opacity duration-150",
+              tab === "Source" ? "opacity-100" : "opacity-0",
             )}
           />
           Source
@@ -46,15 +70,15 @@ export default function Header({
           className={classNames(
             "relative flex py-3 text-sm leading-6 font-semibold focus:outline-none",
             tab === "Settings"
-              ? "text-ayu"
-              : "text-gray-700 hover:text-gray-900 focus:text-gray-900 dark:text-gray-300 dark:hover:text-white"
+              ? "text-ayu-accent"
+              : "text-gray-700 hover:text-gray-900 focus:text-gray-900 dark:text-gray-300 dark:hover:text-white",
           )}
-          onClick={() => onChange("Settings")}
+          onClick={() => onChangeTab("Settings")}
         >
           <span
             className={classNames(
-              "absolute bottom-0 inset-x-0 bg-ayu h-0.5 rounded-full transition-opacity duration-150",
-              tab === "Settings" ? "opacity-100" : "opacity-0"
+              "absolute bottom-0 inset-x-0 bg-ayu-accent h-0.5 rounded-full transition-opacity duration-150",
+              tab === "Settings" ? "opacity-100" : "opacity-0",
             )}
           />
           Settings
@@ -67,6 +91,8 @@ export default function Header({
       </div>
       <div className={"hidden sm:flex items-center min-w-0"}>
         <ShareButton key={edit} onShare={onShare} />
+        <div className="hidden sm:block mx-6 lg:mx-4 w-px h-6 bg-gray-200 dark:bg-gray-700" />
+        <ThemeButton theme={theme} onChange={onChangeTheme} />
       </div>
     </div>
   );

playground/src/Editor/MonacoThemes.tsx

@@ -1,7 +1,11 @@
+/**
+ * Non-rendering component that loads the Monaco editor themes.
+ */
+
 import { useMonaco } from "@monaco-editor/react";
 import { useEffect } from "react";
 
-export default function Themes() {
+export default function MonacoThemes() {
   const monaco = useMonaco();
 
   useEffect(() => {
@@ -631,7 +635,642 @@ export default function Themes() {
           foreground: "#787b8099",
           token: "punctuation.definition.markdown",
         },
-        // Edits.
+        // Manual changes.
+        {
+          foreground: "#fa8d3e",
+          token: "number",
+        },
+      ],
+      encodedTokensColors: [],
+    });
+
+    // Generated via `monaco-vscode-textmate-theme-converter`.
+    // See: https://github.com/ayu-theme/vscode-ayu/blob/91839e8a9dfa78d61e58dbcf9b52272a01fee66a/ayu-dark.json.
+    monaco?.editor.defineTheme("Ayu-Dark", {
+      inherit: false,
+      base: "vs-dark",
+      colors: {
+        focusBorder: "#e6b450b3",
+        foreground: "#565b66",
+        "widget.shadow": "#00000080",
+        "selection.background": "#409fff4d",
+        "icon.foreground": "#565b66",
+        errorForeground: "#d95757",
+        descriptionForeground: "#565b66",
+        "textBlockQuote.background": "#0f131a",
+        "textLink.foreground": "#e6b450",
+        "textLink.activeForeground": "#e6b450",
+        "textPreformat.foreground": "#bfbdb6",
+        "button.background": "#e6b450",
+        "button.foreground": "#0b0e14",
+        "button.hoverBackground": "#e1af4b",
+        "button.secondaryBackground": "#565b6633",
+        "button.secondaryForeground": "#bfbdb6",
+        "button.secondaryHoverBackground": "#565b6680",
+        "dropdown.background": "#0d1017",
+        "dropdown.foreground": "#565b66",
+        "dropdown.border": "#565b6645",
+        "input.background": "#0d1017",
+        "input.border": "#565b6645",
+        "input.foreground": "#bfbdb6",
+        "input.placeholderForeground": "#565b6680",
+        "inputOption.activeBorder": "#e6b4504d",
+        "inputOption.activeBackground": "#e6b45033",
+        "inputOption.activeForeground": "#e6b450",
+        "inputValidation.errorBackground": "#0d1017",
+        "inputValidation.errorBorder": "#d95757",
+        "inputValidation.infoBackground": "#0b0e14",
+        "inputValidation.infoBorder": "#39bae6",
+        "inputValidation.warningBackground": "#0b0e14",
+        "inputValidation.warningBorder": "#ffb454",
+        "scrollbar.shadow": "#11151c00",
+        "scrollbarSlider.background": "#565b6666",
+        "scrollbarSlider.hoverBackground": "#565b6699",
+        "scrollbarSlider.activeBackground": "#565b66b3",
+        "badge.background": "#e6b45033",
+        "badge.foreground": "#e6b450",
+        "progressBar.background": "#e6b450",
+        "list.activeSelectionBackground": "#47526640",
+        "list.activeSelectionForeground": "#bfbdb6",
+        "list.focusBackground": "#47526640",
+        "list.focusForeground": "#bfbdb6",
+        "list.focusOutline": "#47526640",
+        "list.highlightForeground": "#e6b450",
+        "list.deemphasizedForeground": "#d95757",
+        "list.hoverBackground": "#47526640",
+        "list.inactiveSelectionBackground": "#47526633",
+        "list.inactiveSelectionForeground": "#565b66",
+        "list.invalidItemForeground": "#565b664d",
+        "list.errorForeground": "#d95757",
+        "tree.indentGuidesStroke": "#6c738080",
+        "listFilterWidget.background": "#0f131a",
+        "listFilterWidget.outline": "#e6b450",
+        "listFilterWidget.noMatchesOutline": "#d95757",
+        "list.filterMatchBackground": "#5f4c7266",
+        "list.filterMatchBorder": "#6c598066",
+        "activityBar.background": "#0b0e14",
+        "activityBar.foreground": "#565b66cc",
+        "activityBar.inactiveForeground": "#565b6699",
+        "activityBar.border": "#0b0e14",
+        "activityBar.activeBorder": "#e6b450b3",
+        "activityBarBadge.background": "#e6b450",
+        "activityBarBadge.foreground": "#0b0e14",
+        "sideBar.background": "#0b0e14",
+        "sideBar.border": "#0b0e14",
+        "sideBarTitle.foreground": "#565b66",
+        "sideBarSectionHeader.background": "#0b0e14",
+        "sideBarSectionHeader.foreground": "#565b66",
+        "sideBarSectionHeader.border": "#0b0e14",
+        "minimap.background": "#0b0e14",
+        "minimap.selectionHighlight": "#409fff4d",
+        "minimap.errorHighlight": "#d95757",
+        "minimap.findMatchHighlight": "#6c5980",
+        "minimapGutter.addedBackground": "#7fd962",
+        "minimapGutter.modifiedBackground": "#73b8ff",
+        "minimapGutter.deletedBackground": "#f26d78",
+        "editorGroup.border": "#11151c",
+        "editorGroup.background": "#0f131a",
+        "editorGroupHeader.noTabsBackground": "#0b0e14",
+        "editorGroupHeader.tabsBackground": "#0b0e14",
+        "editorGroupHeader.tabsBorder": "#0b0e14",
+        "tab.activeBackground": "#0b0e14",
+        "tab.activeForeground": "#bfbdb6",
+        "tab.border": "#0b0e14",
+        "tab.activeBorder": "#e6b450",
+        "tab.unfocusedActiveBorder": "#565b66",
+        "tab.inactiveBackground": "#0b0e14",
+        "tab.inactiveForeground": "#565b66",
+        "tab.unfocusedActiveForeground": "#565b66",
+        "tab.unfocusedInactiveForeground": "#565b66",
+        "editor.background": "#0b0e14",
+        "editor.foreground": "#bfbdb6",
+        "editorLineNumber.foreground": "#6c738099",
+        "editorLineNumber.activeForeground": "#6c7380e6",
+        "editorCursor.foreground": "#e6b450",
+        "editor.inactiveSelectionBackground": "#409fff21",
+        "editor.selectionBackground": "#409fff4d",
+        "editor.selectionHighlightBackground": "#7fd96226",
+        "editor.selectionHighlightBorder": "#7fd96200",
+        "editor.wordHighlightBackground": "#73b8ff14",
+        "editor.wordHighlightStrongBackground": "#7fd96214",
+        "editor.wordHighlightBorder": "#73b8ff80",
+        "editor.wordHighlightStrongBorder": "#7fd96280",
+        "editor.findMatchBackground": "#6c5980",
+        "editor.findMatchBorder": "#6c5980",
+        "editor.findMatchHighlightBackground": "#6c598066",
+        "editor.findMatchHighlightBorder": "#5f4c7266",
+        "editor.findRangeHighlightBackground": "#6c598040",
+        "editor.rangeHighlightBackground": "#6c598033",
+        "editor.lineHighlightBackground": "#131721",
+        "editorLink.activeForeground": "#e6b450",
+        "editorWhitespace.foreground": "#6c738099",
+        "editorIndentGuide.background": "#6c738033",
+        "editorIndentGuide.activeBackground": "#6c738080",
+        "editorRuler.foreground": "#6c738033",
+        "editorCodeLens.foreground": "#acb6bf8c",
+        "editorBracketMatch.background": "#6c73804d",
+        "editorBracketMatch.border": "#6c73804d",
+        "editor.snippetTabstopHighlightBackground": "#7fd96233",
+        "editorOverviewRuler.border": "#11151c",
+        "editorOverviewRuler.modifiedForeground": "#73b8ff",
+        "editorOverviewRuler.addedForeground": "#7fd962",
+        "editorOverviewRuler.deletedForeground": "#f26d78",
+        "editorOverviewRuler.errorForeground": "#d95757",
+        "editorOverviewRuler.warningForeground": "#e6b450",
+        "editorOverviewRuler.bracketMatchForeground": "#6c7380b3",
+        "editorOverviewRuler.wordHighlightForeground": "#73b8ff66",
+        "editorOverviewRuler.wordHighlightStrongForeground": "#7fd96266",
+        "editorOverviewRuler.findMatchForeground": "#6c5980",
+        "editorError.foreground": "#d95757",
+        "editorWarning.foreground": "#e6b450",
+        "editorGutter.modifiedBackground": "#73b8ffcc",
+        "editorGutter.addedBackground": "#7fd962cc",
+        "editorGutter.deletedBackground": "#f26d78cc",
+        "diffEditor.insertedTextBackground": "#7fd9621f",
+        "diffEditor.removedTextBackground": "#f26d781f",
+        "diffEditor.diagonalFill": "#11151c",
+        "editorWidget.background": "#0f131a",
+        "editorWidget.border": "#11151c",
+        "editorHoverWidget.background": "#0f131a",
+        "editorHoverWidget.border": "#11151c",
+        "editorSuggestWidget.background": "#0f131a",
+        "editorSuggestWidget.border": "#11151c",
+        "editorSuggestWidget.highlightForeground": "#e6b450",
+        "editorSuggestWidget.selectedBackground": "#47526640",
+        "debugExceptionWidget.border": "#11151c",
+        "debugExceptionWidget.background": "#0f131a",
+        "editorMarkerNavigation.background": "#0f131a",
+        "peekView.border": "#47526640",
+        "peekViewTitle.background": "#47526640",
+        "peekViewTitleDescription.foreground": "#565b66",
+        "peekViewTitleLabel.foreground": "#bfbdb6",
+        "peekViewEditor.background": "#0f131a",
+        "peekViewEditor.matchHighlightBackground": "#6c598066",
+        "peekViewEditor.matchHighlightBorder": "#5f4c7266",
+        "peekViewResult.background": "#0f131a",
+        "peekViewResult.fileForeground": "#bfbdb6",
+        "peekViewResult.lineForeground": "#565b66",
+        "peekViewResult.matchHighlightBackground": "#6c598066",
+        "peekViewResult.selectionBackground": "#47526640",
+        "panel.background": "#0b0e14",
+        "panel.border": "#11151c",
+        "panelTitle.activeBorder": "#e6b450",
+        "panelTitle.activeForeground": "#bfbdb6",
+        "panelTitle.inactiveForeground": "#565b66",
+        "statusBar.background": "#0b0e14",
+        "statusBar.foreground": "#565b66",
+        "statusBar.border": "#0b0e14",
+        "statusBar.debuggingBackground": "#f29668",
+        "statusBar.debuggingForeground": "#0d1017",
+        "statusBar.noFolderBackground": "#0f131a",
+        "statusBarItem.activeBackground": "#565b6633",
+        "statusBarItem.hoverBackground": "#565b6633",
+        "statusBarItem.prominentBackground": "#11151c",
+        "statusBarItem.prominentHoverBackground": "#00000030",
+        "statusBarItem.remoteBackground": "#e6b450",
+        "statusBarItem.remoteForeground": "#0d1017",
+        "titleBar.activeBackground": "#0b0e14",
+        "titleBar.activeForeground": "#bfbdb6",
+        "titleBar.inactiveBackground": "#0b0e14",
+        "titleBar.inactiveForeground": "#565b66",
+        "titleBar.border": "#0b0e14",
+        "extensionButton.prominentForeground": "#0d1017",
+        "extensionButton.prominentBackground": "#e6b450",
+        "extensionButton.prominentHoverBackground": "#e1af4b",
+        "pickerGroup.border": "#11151c",
+        "pickerGroup.foreground": "#565b6680",
+        "debugToolBar.background": "#0f131a",
+        "debugIcon.breakpointForeground": "#f29668",
+        "debugIcon.breakpointDisabledForeground": "#f2966880",
+        "debugConsoleInputIcon.foreground": "#e6b450",
+        "welcomePage.tileBackground": "#0b0e14",
+        "welcomePage.tileShadow": "#00000080",
+        "welcomePage.progress.background": "#131721",
+        "welcomePage.buttonBackground": "#e6b45066",
+        "walkThrough.embeddedEditorBackground": "#0f131a",
+        "gitDecoration.modifiedResourceForeground": "#73b8ffb3",
+        "gitDecoration.deletedResourceForeground": "#f26d78b3",
+        "gitDecoration.untrackedResourceForeground": "#7fd962b3",
+        "gitDecoration.ignoredResourceForeground": "#565b6680",
+        "gitDecoration.conflictingResourceForeground": "",
+        "gitDecoration.submoduleResourceForeground": "#d2a6ffb3",
+        "settings.headerForeground": "#bfbdb6",
+        "settings.modifiedItemIndicator": "#73b8ff",
+        "keybindingLabel.background": "#565b661a",
+        "keybindingLabel.foreground": "#bfbdb6",
+        "keybindingLabel.border": "#bfbdb61a",
+        "keybindingLabel.bottomBorder": "#bfbdb61a",
+        "terminal.background": "#0b0e14",
+        "terminal.foreground": "#bfbdb6",
+        "terminal.ansiBlack": "#11151c",
+        "terminal.ansiRed": "#ea6c73",
+        "terminal.ansiGreen": "#7fd962",
+        "terminal.ansiYellow": "#f9af4f",
+        "terminal.ansiBlue": "#53bdfa",
+        "terminal.ansiMagenta": "#cda1fa",
+        "terminal.ansiCyan": "#90e1c6",
+        "terminal.ansiWhite": "#c7c7c7",
+        "terminal.ansiBrightBlack": "#686868",
+        "terminal.ansiBrightRed": "#f07178",
+        "terminal.ansiBrightGreen": "#aad94c",
+        "terminal.ansiBrightYellow": "#ffb454",
+        "terminal.ansiBrightBlue": "#59c2ff",
+        "terminal.ansiBrightMagenta": "#d2a6ff",
+        "terminal.ansiBrightCyan": "#95e6cb",
+        "terminal.ansiBrightWhite": "#ffffff",
+      },
+      rules: [
+        {
+          fontStyle: "italic",
+          foreground: "#acb6bf8c",
+          token: "comment",
+        },
+        {
+          foreground: "#aad94c",
+          token: "string",
+        },
+        {
+          foreground: "#aad94c",
+          token: "constant.other.symbol",
+        },
+        {
+          foreground: "#95e6cb",
+          token: "string.regexp",
+        },
+        {
+          foreground: "#95e6cb",
+          token: "constant.character",
+        },
+        {
+          foreground: "#95e6cb",
+          token: "constant.other",
+        },
+        {
+          foreground: "#d2a6ff",
+          token: "constant.numeric",
+        },
+        {
+          foreground: "#d2a6ff",
+          token: "constant.language",
+        },
+        {
+          foreground: "#bfbdb6",
+          token: "variable",
+        },
+        {
+          foreground: "#bfbdb6",
+          token: "variable.parameter.function-call",
+        },
+        {
+          foreground: "#f07178",
+          token: "variable.member",
+        },
+        {
+          fontStyle: "italic",
+          foreground: "#39bae6",
+          token: "variable.language",
+        },
+        {
+          foreground: "#ff8f40",
+          token: "storage",
+        },
+        {
+          foreground: "#ff8f40",
+          token: "keyword",
+        },
+        {
+          foreground: "#f29668",
+          token: "keyword.operator",
+        },
+        {
+          foreground: "#bfbdb6b3",
+          token: "punctuation.separator",
+        },
+        {
+          foreground: "#bfbdb6b3",
+          token: "punctuation.terminator",
+        },
+        {
+          foreground: "#bfbdb6",
+          token: "punctuation.section",
+        },
+        {
+          foreground: "#f29668",
+          token: "punctuation.accessor",
+        },
+        {
+          foreground: "#ff8f40",
+          token: "punctuation.definition.template-expression",
+        },
+        {
+          foreground: "#ff8f40",
+          token: "punctuation.section.embedded",
+        },
+        {
+          foreground: "#bfbdb6",
+          token: "meta.embedded",
+        },
+        {
+          foreground: "#59c2ff",
+          token: "source.java storage.type",
+        },
+        {
+          foreground: "#59c2ff",
+          token: "source.haskell storage.type",
+        },
+        {
+          foreground: "#59c2ff",
+          token: "source.c storage.type",
+        },
+        {
+          foreground: "#39bae6",
+          token: "entity.other.inherited-class",
+        },
+        {
+          foreground: "#ff8f40",
+          token: "storage.type.function",
+        },
+        {
+          foreground: "#39bae6",
+          token: "source.java storage.type.primitive",
+        },
+        {
+          foreground: "#ffb454",
+          token: "entity.name.function",
+        },
+        {
+          foreground: "#d2a6ff",
+          token: "variable.parameter",
+        },
+        {
+          foreground: "#d2a6ff",
+          token: "meta.parameter",
+        },
+        {
+          foreground: "#ffb454",
+          token: "variable.function",
+        },
+        {
+          foreground: "#ffb454",
+          token: "variable.annotation",
+        },
+        {
+          foreground: "#ffb454",
+          token: "meta.function-call.generic",
+        },
+        {
+          foreground: "#ffb454",
+          token: "support.function.go",
+        },
+        {
+          foreground: "#f07178",
+          token: "support.function",
+        },
+        {
+          foreground: "#f07178",
+          token: "support.macro",
+        },
+        {
+          foreground: "#aad94c",
+          token: "entity.name.import",
+        },
+        {
+          foreground: "#aad94c",
+          token: "entity.name.package",
+        },
+        {
+          foreground: "#59c2ff",
+          token: "entity.name",
+        },
+        {
+          foreground: "#39bae6",
+          token: "entity.name.tag",
+        },
+        {
+          foreground: "#39bae6",
+          token: "meta.tag.sgml",
+        },
+        {
+          foreground: "#59c2ff",
+          token: "support.class.component",
+        },
+        {
+          foreground: "#39bae680",
+          token: "punctuation.definition.tag.end",
+        },
+        {
+          foreground: "#39bae680",
+          token: "punctuation.definition.tag.begin",
+        },
+        {
+          foreground: "#39bae680",
+          token: "punctuation.definition.tag",
+        },
+        {
+          foreground: "#ffb454",
+          token: "entity.other.attribute-name",
+        },
+        {
+          fontStyle: "italic",
+          foreground: "#f29668",
+          token: "support.constant",
+        },
+        {
+          foreground: "#39bae6",
+          token: "support.type",
+        },
+        {
+          foreground: "#39bae6",
+          token: "support.class",
+        },
+        {
+          foreground: "#39bae6",
+          token: "source.go storage.type",
+        },
+        {
+          foreground: "#e6b673",
+          token: "meta.decorator variable.other",
+        },
+        {
+          foreground: "#e6b673",
+          token: "meta.decorator punctuation.decorator",
+        },
+        {
+          foreground: "#e6b673",
+          token: "storage.type.annotation",
+        },
+        {
+          foreground: "#d95757",
+          token: "invalid",
+        },
+        {
+          foreground: "#c594c5",
+          token: "meta.diff",
+        },
+        {
+          foreground: "#c594c5",
+          token: "meta.diff.header",
+        },
+        {
+          foreground: "#ffb454",
+          token: "source.ruby variable.other.readwrite",
+        },
+        {
+          foreground: "#59c2ff",
+          token: "source.css entity.name.tag",
+        },
+        {
+          foreground: "#59c2ff",
+          token: "source.sass entity.name.tag",
+        },
+        {
+          foreground: "#59c2ff",
+          token: "source.scss entity.name.tag",
+        },
+        {
+          foreground: "#59c2ff",
+          token: "source.less entity.name.tag",
+        },
+        {
+          foreground: "#59c2ff",
+          token: "source.stylus entity.name.tag",
+        },
+        {
+          foreground: "#acb6bf8c",
+          token: "source.css support.type",
+        },
+        {
+          foreground: "#acb6bf8c",
+          token: "source.sass support.type",
+        },
+        {
+          foreground: "#acb6bf8c",
+          token: "source.scss support.type",
+        },
+        {
+          foreground: "#acb6bf8c",
+          token: "source.less support.type",
+        },
+        {
+          foreground: "#acb6bf8c",
+          token: "source.stylus support.type",
+        },
+        {
+          fontStyle: "normal",
+          foreground: "#39bae6",
+          token: "support.type.property-name",
+        },
+        {
+          foreground: "#acb6bf8c",
+          token: "constant.numeric.line-number.find-in-files - match",
+        },
+        {
+          foreground: "#ff8f40",
+          token: "constant.numeric.line-number.match",
+        },
+        {
+          foreground: "#aad94c",
+          token: "entity.name.filename.find-in-files",
+        },
+        {
+          foreground: "#d95757",
+          token: "message.error",
+        },
+        {
+          fontStyle: "bold",
+          foreground: "#aad94c",
+          token: "markup.heading",
+        },
+        {
+          fontStyle: "bold",
+          foreground: "#aad94c",
+          token: "markup.heading entity.name",
+        },
+        {
+          foreground: "#39bae6",
+          token: "markup.underline.link",
+        },
+        {
+          foreground: "#39bae6",
+          token: "string.other.link",
+        },
+        {
+          fontStyle: "italic",
+          foreground: "#f07178",
+          token: "markup.italic",
+        },
+        {
+          fontStyle: "bold",
+          foreground: "#f07178",
+          token: "markup.bold",
+        },
+        {
+          fontStyle: "bold italic",
+          token: "markup.italic markup.bold",
+        },
+        {
+          fontStyle: "bold italic",
+          token: "markup.bold markup.italic",
+        },
+        {
+          background: "#bfbdb605",
+          token: "markup.raw",
+        },
+        {
+          background: "#bfbdb60f",
+          token: "markup.raw.inline",
+        },
+        {
+          fontStyle: "bold",
+          background: "#bfbdb60f",
+          foreground: "#acb6bf8c",
+          token: "meta.separator",
+        },
+        {
+          foreground: "#95e6cb",
+          fontStyle: "italic",
+          token: "markup.quote",
+        },
+        {
+          foreground: "#ffb454",
+          token: "markup.list punctuation.definition.list.begin",
+        },
+        {
+          foreground: "#7fd962",
+          token: "markup.inserted",
+        },
+        {
+          foreground: "#73b8ff",
+          token: "markup.changed",
+        },
+        {
+          foreground: "#f26d78",
+          token: "markup.deleted",
+        },
+        {
+          foreground: "#e6b673",
+          token: "markup.strike",
+        },
+        {
+          background: "#bfbdb60f",
+          foreground: "#39bae6",
+          token: "markup.table",
+        },
+        {
+          foreground: "#f29668",
+          token: "text.html.markdown markup.inline.raw",
+        },
+        {
+          background: "#acb6bf8c",
+          foreground: "#acb6bf8c",
+          token: "text.html.markdown meta.dummy.line-break",
+        },
+        {
+          background: "#bfbdb6",
+          foreground: "#acb6bf8c",
+          token: "punctuation.definition.markdown",
+        },
+        // Manual changes.
         {
           foreground: "#fa8d3e",
           token: "number",

playground/src/Editor/SettingsEditor.tsx

@@ -5,14 +5,17 @@
 import Editor, { useMonaco } from "@monaco-editor/react";
 import { useCallback, useEffect } from "react";
 import schema from "../../../ruff.schema.json";
+import { Theme } from "./theme";
 
 export default function SettingsEditor({
   visible,
   source,
+  theme,
   onChange,
 }: {
   visible: boolean;
   source: string;
+  theme: Theme;
   onChange: (source: string) => void;
 }) {
   const monaco = useMonaco();
@@ -33,7 +36,7 @@ export default function SettingsEditor({
     (value: string | undefined) => {
       onChange(value ?? "");
     },
-    [onChange]
+    [onChange],
   );
   return (
     <Editor
@@ -47,7 +50,7 @@ export default function SettingsEditor({
       wrapperProps={visible ? {} : { style: { display: "none" } }}
       language={"json"}
       value={source}
-      theme={"Ayu-Light"}
+      theme={theme === "light" ? "Ayu-Light" : "Ayu-Dark"}
       onChange={handleChange}
     />
   );

playground/src/Editor/ShareButton.tsx

@@ -13,7 +13,7 @@ export default function ShareButton({ onShare }: { onShare?: () => void }) {
   return copied ? (
     <button
       type="button"
-      className="relative flex-none rounded-md text-sm font-semibold leading-6 py-1.5 px-3 cursor-auto text-ayu shadow-copied dark:bg-ayu/10"
+      className="relative flex-none rounded-md text-sm font-semibold leading-6 py-1.5 px-3 cursor-auto text-ayu-accent shadow-copied dark:bg-ayu-accent/10"
     >
       <span
         className="absolute inset-0 flex items-center justify-center invisible"
@@ -28,7 +28,7 @@ export default function ShareButton({ onShare }: { onShare?: () => void }) {
   ) : (
     <button
       type="button"
-      className="relative flex-none rounded-md text-sm font-semibold leading-6 py-1.5 px-3 enabled:hover:bg-ayu/80 bg-ayu text-white shadow-sm dark:shadow-highlight/20 disabled:opacity-50"
+      className="relative flex-none rounded-md text-sm font-semibold leading-6 py-1.5 px-3 enabled:hover:bg-ayu-accent/80 bg-ayu-accent text-white shadow-sm dark:shadow-highlight/20 disabled:opacity-50"
       disabled={!onShare || copied}
       onClick={
         onShare

playground/src/Editor/SourceEditor.tsx

@@ -6,18 +6,19 @@ import Editor, { useMonaco } from "@monaco-editor/react";
 import { MarkerSeverity, MarkerTag } from "monaco-editor";
 import { useCallback, useEffect } from "react";
 import { Check } from "../pkg";
-
-export type Mode = "JSON" | "Python";
+import { Theme } from "./theme";
 
 export default function SourceEditor({
   visible,
   source,
+  theme,
   checks,
   onChange,
 }: {
   visible: boolean;
   source: string;
   checks: Check[];
+  theme: Theme;
   onChange: (pythonSource: string) => void;
 }) {
   const monaco = useMonaco();
@@ -43,7 +44,7 @@ export default function SourceEditor({
           check.code === "F401" || check.code === "F841"
             ? [MarkerTag.Unnecessary]
             : [],
-      }))
+      })),
     );
 
     const codeActionProvider = monaco?.languages.registerCodeActionProvider(
@@ -55,7 +56,9 @@ export default function SourceEditor({
             .filter((check) => position.startLineNumber === check.location.row)
             .filter((check) => check.fix)
             .map((check) => ({
-              title: `Fix ${check.code}`,
+              title: check.fix
+                ? `${check.code}: ${check.fix.message}` ?? `Fix ${check.code}`
+                : "Autofix",
               id: `fix-${check.code}`,
               kind: "quickfix",
               edit: check.fix
@@ -80,7 +83,7 @@ export default function SourceEditor({
             }));
           return { actions, dispose: () => {} };
         },
-      }
+      },
     );
 
     return () => {
@@ -92,7 +95,7 @@ export default function SourceEditor({
     (value: string | undefined) => {
       onChange(value ?? "");
     },
-    [onChange]
+    [onChange],
   );
 
   return (
@@ -104,9 +107,9 @@ export default function SourceEditor({
         roundedSelection: false,
         scrollBeyondLastLine: false,
       }}
-      wrapperProps={visible ? {} : { style: { display: "none" } }}
-      theme={"Ayu-Light"}
       language={"python"}
+      wrapperProps={visible ? {} : { style: { display: "none" } }}
+      theme={theme === "light" ? "Ayu-Light" : "Ayu-Dark"}
       value={source}
       onChange={handleChange}
     />

playground/src/Editor/ThemeButton.tsx

@@ -0,0 +1,49 @@
+/**
+ * Button to toggle between light and dark mode themes.
+ */
+import { Theme } from "./theme";
+
+export default function ThemeButton({
+  theme,
+  onChange,
+}: {
+  theme: Theme;
+  onChange: (theme: Theme) => void;
+}) {
+  return (
+    <button
+      type="button"
+      className="ml-4 sm:ml-0 ring-1 ring-gray-900/5 shadow-sm hover:bg-gray-50 dark:ring-0 dark:bg-gray-800 dark:hover:bg-gray-700 dark:shadow-highlight/4 group focus:outline-none focus-visible:ring-2 rounded-md focus-visible:ring-ayu-accent dark:focus-visible:ring-2 dark:focus-visible:ring-gray-400"
+      onClick={() => onChange(theme === "light" ? "dark" : "light")}
+    >
+      <span className="sr-only">
+        <span className="dark:hidden">Switch to dark theme</span>
+        <span className="hidden dark:inline">Switch to light theme</span>
+      </span>
+      <svg
+        width="36"
+        height="36"
+        viewBox="-6 -6 36 36"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+        className="stroke-ayu-accent fill-ayu-accent/10 group-hover:stroke-ayu-accent/80 dark:stroke-gray-400 dark:fill-gray-400/20 dark:group-hover:stroke-gray-300"
+      >
+        <g className="dark:opacity-0">
+          <path d="M15 12a3 3 0 1 1-6 0 3 3 0 0 1 6 0Z"></path>
+          <path
+            d="M12 4v.01M17.66 6.345l-.007.007M20.005 12.005h-.01M17.66 17.665l-.007-.007M12 20.01V20M6.34 17.665l.007-.007M3.995 12.005h.01M6.34 6.344l.007.007"
+            fill="none"
+          />
+        </g>
+        <g className="opacity-0 dark:opacity-100">
+          <path d="M16 12a4 4 0 1 1-8 0 4 4 0 0 1 8 0Z" />
+          <path
+            d="M12 3v1M18.66 5.345l-.828.828M21.005 12.005h-1M18.66 18.665l-.828-.828M12 21.01V20M5.34 18.666l.835-.836M2.995 12.005h1.01M5.34 5.344l.835.836"
+            fill="none"
+          />
+        </g>
+      </svg>
+    </button>
+  );
+}

playground/src/Editor/VersionTag.tsx

@@ -17,7 +17,7 @@ export default function VersionTag({ children }: { children: ReactNode }) {
         "items-center",
         "dark:bg-gray-800",
         "dark:text-gray-400",
-        "dark:shadow-highlight/4"
+        "dark:shadow-highlight/4",
       )}
     >
       {children}

playground/src/Editor/config.ts

@@ -1,63 +0,0 @@
-import lzstring from "lz-string";
-import { OptionGroup } from "../ruff_options";
-
-export type Config = { [K: string]: any };
-
-/**
- * Parse an encoded value from the options export.
- *
- * TODO(charlie): Use JSON for the default values.
- */
-function parse(value: any): any {
-  if (value == "None") {
-    return null;
-  }
-  return JSON.parse(value);
-}
-
-/**
- * The default configuration for the playground.
- */
-export function defaultConfig(availableOptions: OptionGroup[]): Config {
-  const config: Config = {};
-  for (const group of availableOptions) {
-    if (group.name == "globals") {
-      for (const field of group.fields) {
-        config[field.name] = parse(field.default);
-      }
-    } else {
-      config[group.name] = {};
-      for (const field of group.fields) {
-        config[group.name][field.name] = parse(field.default);
-      }
-    }
-  }
-  return config;
-}
-
-/**
- * Persist the configuration to a URL.
- */
-export function persist(configSource: string, pythonSource: string) {
-  window.location.hash = lzstring.compressToEncodedURIComponent(
-    configSource + "$$$" + pythonSource
-  );
-}
-
-/**
- * Restore the configuration from a URL.
- */
-export function restore(): [string, string] | null {
-  const value = lzstring.decompressFromEncodedURIComponent(
-    window.location.hash.slice(1)
-  );
-
-  if (value) {
-    const parts = value.split("$$$");
-    const configSource = parts[0];
-    const pythonSource = parts[1];
-    return [configSource, pythonSource];
-  } else {
-    return null;
-  }
-}

playground/src/Editor/settings.ts

@@ -0,0 +1,50 @@
+import lzstring from "lz-string";
+
+export type Settings = { [K: string]: any };
+
+/**
+ * Stringify a settings object to JSON.
+ */
+export function stringify(settings: Settings): string {
+  return JSON.stringify(
+    settings,
+    (k, v) => {
+      if (v instanceof Map) {
+        return Object.fromEntries(v.entries());
+      } else {
+        return v;
+      }
+    },
+    2,
+  );
+}
+
+/**
+ * Persist the configuration to a URL.
+ */
+export async function persist(settingsSource: string, pythonSource: string) {
+  const hash = lzstring.compressToEncodedURIComponent(
+    settingsSource + "$$$" + pythonSource,
+  );
+  await navigator.clipboard.writeText(
+    window.location.href.split("#")[0] + "#" + hash,
+  );
+}
+
+/**
+ * Restore the configuration from a URL.
+ */
+export function restore(): [string, string] | null {
+  const value = lzstring.decompressFromEncodedURIComponent(
+    window.location.hash.slice(1),
+  );
+
+  if (value) {
+    const parts = value.split("$$$");
+    const settingsSource = parts[0];
+    const pythonSource = parts[1];
+    return [settingsSource, pythonSource];
+  } else {
+    return null;
+  }
+}

playground/src/Editor/theme.ts

@@ -0,0 +1,35 @@
+/**
+ * Light and dark mode theming.
+ */
+import { useEffect, useState } from "react";
+
+export type Theme = "dark" | "light";
+
+export function useTheme(): [Theme, (theme: Theme) => void] {
+  const [localTheme, setLocalTheme] = useState<Theme>("light");
+
+  const setTheme = (mode: Theme) => {
+    if (mode === "dark") {
+      document.body.classList.add("dark");
+    } else {
+      document.body.classList.remove("dark");
+    }
+    localStorage.setItem("theme", mode);
+    setLocalTheme(mode);
+  };
+
+  useEffect(() => {
+    const initialTheme = localStorage.getItem("theme");
+    if (initialTheme === "dark") {
+      setTheme("dark");
+    } else if (initialTheme === "light") {
+      setTheme("light");
+    } else if (window.matchMedia("(prefers-color-scheme: dark)").matches) {
+      setTheme("dark");
+    } else {
+      setTheme("light");
+    }
+  }, []);
+
+  return [localTheme, setTheme];
+}

playground/src/Editor/utils.ts

@@ -0,0 +1,7 @@
+export async function copyTextToClipboard(text: string) {
+  if ("clipboard" in navigator) {
+    return await navigator.clipboard.writeText(text);
+  } else {
+    return document.execCommand("copy", true, text);
+  }
+}

playground/src/constants.ts

@@ -1,6 +1,3 @@
-import { defaultConfig } from "./Editor/config";
-import { AVAILABLE_OPTIONS } from "./ruff_options";
-
 export const DEFAULT_PYTHON_SOURCE =
   "import os\n" +
   "\n" +
@@ -32,9 +29,3 @@ export const DEFAULT_PYTHON_SOURCE =
   "# 13\n" +
   "# 21\n" +
   "# 34\n";
-
-export const DEFAULT_CONFIG_SOURCE = JSON.stringify(
-  defaultConfig(AVAILABLE_OPTIONS),
-  null,
-  2
-);

playground/src/main.tsx

@@ -6,5 +6,5 @@ import "./index.css";
 ReactDOM.createRoot(document.getElementById("root") as HTMLElement).render(
   <React.StrictMode>
     <Editor />
-  </React.StrictMode>
+  </React.StrictMode>,
 );

playground/src/ruff_options.ts

@@ -1,244 +0,0 @@
-
-// This file is auto-generated by `cargo dev generate-playground-options`.
-export interface OptionGroup {
-    name: string;
-    fields: {
-        name: string;
-        default: string;
-        type: string;
-    }[];
-};
-
-export const AVAILABLE_OPTIONS: OptionGroup[] = [
-    {"name": "globals", "fields": [
-        {
-            "name": "allowed-confusables",
-            "default": '[]',
-            "type": 'Vec<char>',
-        },
-        {
-            "name": "dummy-variable-rgx",
-            "default": '"^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"',
-            "type": 'Regex',
-        },
-        {
-            "name": "extend-ignore",
-            "default": '[]',
-            "type": 'Vec<CheckCodePrefix>',
-        },
-        {
-            "name": "extend-select",
-            "default": '[]',
-            "type": 'Vec<CheckCodePrefix>',
-        },
-        {
-            "name": "external",
-            "default": '[]',
-            "type": 'Vec<String>',
-        },
-        {
-            "name": "fix-only",
-            "default": 'false',
-            "type": 'bool',
-        },
-        {
-            "name": "ignore",
-            "default": '[]',
-            "type": 'Vec<CheckCodePrefix>',
-        },
-        {
-            "name": "line-length",
-            "default": '88',
-            "type": 'usize',
-        },
-        {
-            "name": "required-version",
-            "default": 'None',
-            "type": 'String',
-        },
-        {
-            "name": "select",
-            "default": '["E", "F"]',
-            "type": 'Vec<CheckCodePrefix>',
-        },
-        {
-            "name": "target-version",
-            "default": '"py310"',
-            "type": 'PythonVersion',
-        },
-        {
-            "name": "unfixable",
-            "default": '[]',
-            "type": 'Vec<CheckCodePrefix>',
-        },
-        {
-            "name": "update-check",
-            "default": 'true',
-            "type": 'bool',
-        },
-    ]},
-    {"name": "flake8-annotations", "fields": [
-        {
-            "name": "allow-star-arg-any",
-            "default": 'false',
-            "type": 'bool',
-        },
-        {
-            "name": "mypy-init-return",
-            "default": 'false',
-            "type": 'bool',
-        },
-        {
-            "name": "suppress-dummy-args",
-            "default": 'false',
-            "type": 'bool',
-        },
-        {
-            "name": "suppress-none-returning",
-            "default": 'false',
-            "type": 'bool',
-        },
-    ]},
-    {"name": "flake8-bugbear", "fields": [
-        {
-            "name": "extend-immutable-calls",
-            "default": '[]',
-            "type": 'Vec<String>',
-        },
-    ]},
-    {"name": "flake8-errmsg", "fields": [
-        {
-            "name": "max-string-length",
-            "default": '0',
-            "type": 'usize',
-        },
-    ]},
-    {"name": "flake8-import-conventions", "fields": [
-        {
-            "name": "aliases",
-            "default": '{"altair": "alt", "matplotlib.pyplot": "plt", "numpy": "np", "pandas": "pd", "seaborn": "sns"}',
-            "type": 'FxHashMap<String, String>',
-        },
-        {
-            "name": "extend-aliases",
-            "default": '{}',
-            "type": 'FxHashMap<String, String>',
-        },
-    ]},
-    {"name": "flake8-quotes", "fields": [
-        {
-            "name": "avoid-escape",
-            "default": 'true',
-            "type": 'bool',
-        },
-        {
-            "name": "docstring-quotes",
-            "default": '"double"',
-            "type": 'Quote',
-        },
-        {
-            "name": "inline-quotes",
-            "default": '"double"',
-            "type": 'Quote',
-        },
-        {
-            "name": "multiline-quotes",
-            "default": '"double"',
-            "type": 'Quote',
-        },
-    ]},
-    {"name": "flake8-tidy-imports", "fields": [
-        {
-            "name": "ban-relative-imports",
-            "default": '"parents"',
-            "type": 'Strictness',
-        },
-    ]},
-    {"name": "flake8-unused-arguments", "fields": [
-        {
-            "name": "ignore-variadic-names",
-            "default": 'false',
-            "type": 'bool',
-        },
-    ]},
-    {"name": "isort", "fields": [
-        {
-            "name": "combine-as-imports",
-            "default": 'false',
-            "type": 'bool',
-        },
-        {
-            "name": "extra-standard-library",
-            "default": '[]',
-            "type": 'Vec<String>',
-        },
-        {
-            "name": "force-single-line",
-            "default": 'false',
-            "type": 'bool',
-        },
-        {
-            "name": "force-wrap-aliases",
-            "default": 'false',
-            "type": 'bool',
-        },
-        {
-            "name": "known-first-party",
-            "default": '[]',
-            "type": 'Vec<String>',
-        },
-        {
-            "name": "known-third-party",
-            "default": '[]',
-            "type": 'Vec<String>',
-        },
-        {
-            "name": "single-line-exclusions",
-            "default": '[]',
-            "type": 'Vec<String>',
-        },
-        {
-            "name": "split-on-trailing-comma",
-            "default": 'true',
-            "type": 'bool',
-        },
-    ]},
-    {"name": "mccabe", "fields": [
-        {
-            "name": "max-complexity",
-            "default": '10',
-            "type": 'usize',
-        },
-    ]},
-    {"name": "pep8-naming", "fields": [
-        {
-            "name": "classmethod-decorators",
-            "default": '["classmethod"]',
-            "type": 'Vec<String>',
-        },
-        {
-            "name": "ignore-names",
-            "default": '["setUp", "tearDown", "setUpClass", "tearDownClass", "setUpModule", "tearDownModule", "asyncSetUp", "asyncTearDown", "setUpTestData", "failureException", "longMessage", "maxDiff"]',
-            "type": 'Vec<String>',
-        },
-        {
-            "name": "staticmethod-decorators",
-            "default": '["staticmethod"]',
-            "type": 'Vec<String>',
-        },
-    ]},
-    {"name": "pydocstyle", "fields": [
-        {
-            "name": "convention",
-            "default": 'None',
-            "type": 'Convention',
-        },
-    ]},
-    {"name": "pyupgrade", "fields": [
-        {
-            "name": "keep-runtime-typing",
-            "default": 'false',
-            "type": 'bool',
-        },
-    ]},
-];

playground/src/third-party.d.ts

@@ -1,6 +1,6 @@
 declare module "lz-string" {
   function decompressFromEncodedURIComponent(
-    input: string | null
+    input: string | null,
   ): string | null;
   function compressToEncodedURIComponent(input: string | null): string;
 }

playground/tailwind.config.cjs

@@ -2,11 +2,16 @@
 const defaultTheme = require("tailwindcss/defaultTheme");
 
 module.exports = {
+  darkMode: "class",
   content: ["./index.html", "./src/**/*.{js,ts,jsx,tsx}"],
   theme: {
     extend: {
       colors: {
-        ayu: "#f07171",
+        "ayu-accent": "#f07171",
+        "ayu-background": {
+          DEFAULT: "#f8f9fa",
+          dark: "#0b0e14",
+        },
       },
       fontFamily: {
         sans: ["Inter var", ...defaultTheme.fontFamily.sans],

pyproject.toml

@@ -1,5 +1,19 @@
+[build-system]
+requires = ["maturin>=0.14,<0.15"]
+build-backend = "maturin"
+
 [project]
 name = "ruff"
+version = "0.0.205"
+description = "An extremely fast Python linter, written in Rust."
+authors = [
+  { name = "Charlie Marsh", email = "charlie.r.marsh@gmail.com" },
+]
+maintainers = [
+  { name = "Charlie Marsh", email = "charlie.r.marsh@gmail.com" },
+]
+requires-python = ">=3.7"
+license = { file = "LICENSE" }
 keywords = ["automation", "flake8", "pycodestyle", "pyflakes", "pylint", "clippy"]
 classifiers = [
     "Development Status :: 3 - Alpha",
@@ -17,24 +31,14 @@ classifiers = [
     "Topic :: Software Development :: Libraries :: Python Modules",
     "Topic :: Software Development :: Quality Assurance",
 ]
-author = "Charlie Marsh"
-author_email = "charlie.r.marsh@gmail.com"
-description = "An extremely fast Python linter, written in Rust."
-requires-python = ">=3.7"
-
-[project.urls]
-repository = "https://github.com/charliermarsh/ruff"
-
-[build-system]
-requires = ["maturin>=0.14,<0.15"]
-build-backend = "maturin"
+urls = { repository = "https://github.com/charliermarsh/ruff-lsp" }
 
 [tool.maturin]
 bindings = "bin"
 strip = true
 
 [tool.ruff]
-update-check = true
+line-length = 88
 
 [tool.ruff.isort]
 force-wrap-aliases = true

resources/test/fixtures/flake8_bandit/S105.py

@@ -51,3 +51,12 @@ secret == "s3cr3t"
 token == "s3cr3t"
 secrete == "s3cr3t"
 password == safe == "s3cr3t"
+
+if token == "1\n2":
+    pass
+
+if token == "3\t4":
+    pass
+
+if token == "5\r6":
+    pass

resources/test/fixtures/flake8_implicit_str_concat/ISC.py

@@ -0,0 +1,36 @@
+_ = "a" "b" "c"
+
+_ = "abc" + "def"
+
+_ = "abc" \
+    "def"
+
+_ = (
+  "abc" +
+  "def"
+)
+
+_ = (
+  f"abc" +
+  "def"
+)
+
+_ = (
+  b"abc" +
+  b"def"
+)
+
+_ = (
+  "abc"
+  "def"
+)
+
+_ = (
+  f"abc"
+  "def"
+)
+
+_ = (
+  b"abc"
+  b"def"
+)

resources/test/fixtures/flake8_tidy_imports/TID251.py

@@ -0,0 +1,33 @@
+## Banned modules ##
+import cgi
+
+from cgi import *
+
+from cgi import a, b, c
+
+# banning a module also bans any submodules
+import cgi.foo.bar
+
+from cgi.foo import bar
+
+from cgi.foo.bar import *
+
+## Banned module members ##
+
+from typing import TypedDict
+
+import typing
+
+# attribute access is checked
+typing.TypedDict
+
+typing.TypedDict.anything
+
+# function calls are checked
+typing.TypedDict()
+
+typing.TypedDict.anything()
+
+# import aliases are resolved
+import typing as totally_not_typing
+totally_not_typing.TypedDict

resources/test/fixtures/flake8_tidy_imports/TID251_false_positives.py

@@ -0,0 +1,11 @@
+# module members cannot be imported with that syntax
+import typing.TypedDict
+
+# we don't track reassignments
+import typing, other
+typing = other
+typing.TypedDict()
+
+# yet another false positive
+def foo(typing):
+    typing.TypedDict()

resources/test/fixtures/isort/line_ending_cr.py

@@ -0,0 +1 @@
+from long_module_name import member_one, member_two, member_three, member_four, member_five

resources/test/fixtures/isort/line_ending_crlf.py

@@ -0,0 +1,2 @@
+from long_module_name import member_one, member_two, member_three, member_four, member_five
+

resources/test/fixtures/isort/line_ending_lf.py

@@ -0,0 +1,2 @@
+from long_module_name import member_one, member_two, member_three, member_four, member_five
+

resources/test/fixtures/pyflakes/F401_7.py

@@ -1,16 +1,66 @@
 """Test: noqa directives."""
 
-from module import (
-    A,  # noqa: F401
-    B,
+# This should ignore both errors.
+from typing import (  # noqa: F401
+    List,
+    Sequence,
 )
 
-from module import (
-    A,  # noqa: F401
-    B,  # noqa: F401
+# This should ignore both errors.
+from typing import (  # noqa
+    List,
+    Sequence,
 )
 
-from module import (
-    A,
-    B,
+# This should ignore both errors.
+from typing import (
+    List,  # noqa: F401
+    Sequence,  # noqa: F401
 )
+
+# This should ignore both errors.
+from typing import (
+    List,  # noqa
+    Sequence,  # noqa
+)
+
+# This should ignore the first error.
+from typing import (
+    Mapping,  # noqa: F401
+    Union,
+)
+
+# This should ignore both errors.
+from typing import (  # noqa
+    List,
+    Sequence,
+)
+
+# This should ignore the error, but the inner noqa should be marked as unused.
+from typing import (  # noqa: F401
+    Optional,  # noqa: F401
+)
+
+# This should ignore the error, but the inner noqa should be marked as unused.
+from typing import (  # noqa
+    Optional,  # noqa: F401
+)
+
+# This should ignore the error, but mark F501 as unused.
+from typing import (  # noqa: F401
+    Dict,  # noqa: F501
+)
+
+# This should ignore the error, but mark F501 as unused.
+from typing import (  # noqa: F501
+    Tuple,  # noqa: F401
+)
+
+# This should ignore both errors.
+from typing import Any, AnyStr  # noqa: F401
+
+# This should ignore both errors.
+from typing import AsyncIterable, AsyncGenerator  # noqa
+
+# This should mark F501 as unused.
+from typing import Awaitable, AwaitableGenerator  # noqa: F501

resources/test/fixtures/pyflakes/F541.py

@@ -1,6 +1,8 @@
+# OK
 a = "abc"
 b = f"ghi{'jkl'}"
 
+# Errors
 c = f"def"
 d = f"def" + "ghi"
 e = (
@@ -8,5 +10,17 @@ e = (
     "ghi"
 )
 
+# OK
 g = f"ghi{123:{45}}"
+
+# Error
 h = "x" "y" f"z"
+
+v = 23.234234
+
+# OK
+f"{v:0.2f}"
+
+# OK (false negatives)
+f"{v:{f'0.2f'}}"
+f"{f''}"

resources/test/fixtures/pyflakes/F831.py

@@ -1,10 +0,0 @@
-def foo(x: int, y: int, x: int) -> None:
-    pass
-
-
-def bar(x: int, y: int, *, x: int) -> None:
-    pass
-
-
-def baz(x: int, y: int, **x: int) -> None:
-    pass

resources/test/fixtures/pyproject.toml

@@ -42,6 +42,10 @@ staticmethod-decorators = ["staticmethod"]
 [tool.ruff.flake8-tidy-imports]
 ban-relative-imports = "parents"
 
+[tool.ruff.flake8-tidy-imports.banned-api]
+"cgi".msg = "The cgi module is deprecated."
+"typing.TypedDict".msg = "Use typing_extensions.TypedDict instead."
+
 [tool.ruff.flake8-errmsg]
 max-string-length = 20
 

resources/test/fixtures/pyupgrade/UP025.py

@@ -0,0 +1,27 @@
+# These should change
+x = u"Hello"
+
+u'world'
+
+print(u"Hello")
+
+print(u'world')
+
+import foo
+
+foo(u"Hello", U"world", a=u"Hello", b=u"world")
+
+# These should stay quoted they way they are
+
+x = u'hello'
+x = u"""hello"""
+x = u'''hello'''
+x = u'Hello "World"'
+
+# These should not change
+u = "Hello"
+
+u = u
+
+def hello():
+    return"Hello"

resources/test/fixtures/ruff/RUF100_1.py

@@ -0,0 +1,64 @@
+# This should ignore both errors.
+from typing import (  # noqa: F401
+    List,
+    Sequence,
+)
+
+# This should ignore both errors.
+from typing import (  # noqa
+    List,
+    Sequence,
+)
+
+# This should ignore both errors.
+from typing import (
+    List,  # noqa: F401
+    Sequence,  # noqa: F401
+)
+
+# This should ignore both errors.
+from typing import (
+    List,  # noqa
+    Sequence,  # noqa
+)
+
+# This should ignore the first error.
+from typing import (
+    Mapping,  # noqa: F401
+    Union,
+)
+
+# This should ignore both errors.
+from typing import (  # noqa
+    List,
+    Sequence,
+)
+
+# This should ignore the error, but the inner noqa should be marked as unused.
+from typing import (  # noqa: F401
+    Optional,  # noqa: F401
+)
+
+# This should ignore the error, but the inner noqa should be marked as unused.
+from typing import (  # noqa
+    Optional,  # noqa: F401
+)
+
+# This should ignore the error, but mark F501 as unused.
+from typing import (  # noqa: F401
+    Dict,  # noqa: F501
+)
+
+# This should ignore the error, but mark F501 as unused.
+from typing import (  # noqa: F501
+    Tuple,  # noqa: F401
+)
+
+# This should ignore both errors.
+from typing import Any, AnyStr  # noqa: F401
+
+# This should ignore both errors.
+from typing import AsyncIterable, AsyncGenerator  # noqa
+
+# This should mark F501 as unused.
+from typing import Awaitable, AwaitableGenerator  # noqa: F501

ruff.schema.json

@@ -375,6 +375,19 @@
   },
   "additionalProperties": false,
   "definitions": {
+    "BannedApi": {
+      "type": "object",
+      "required": [
+        "msg"
+      ],
+      "properties": {
+        "msg": {
+          "description": "The message to display when the API is used.",
+          "type": "string"
+        }
+      },
+      "additionalProperties": false
+    },
     "CheckCodePrefix": {
       "type": "string",
       "enum": [
@@ -639,8 +652,6 @@
         "F821",
         "F822",
         "F823",
-        "F83",
-        "F831",
         "F84",
         "F841",
         "F842",
@@ -670,6 +681,12 @@
         "ICN0",
         "ICN00",
         "ICN001",
+        "ISC",
+        "ISC0",
+        "ISC00",
+        "ISC001",
+        "ISC002",
+        "ISC003",
         "M",
         "M0",
         "M001",
@@ -842,6 +859,7 @@
         "TID",
         "TID2",
         "TID25",
+        "TID251",
         "TID252",
         "U",
         "U0",
@@ -891,6 +909,7 @@
         "UP021",
         "UP022",
         "UP023",
+        "UP025",
         "W",
         "W2",
         "W29",
@@ -1085,6 +1104,16 @@
               "type": "null"
             }
           ]
+        },
+        "banned-api": {
+          "description": "Specific modules or module members that may not be imported or accessed. Note that this check is only meant to flag accidental uses, and can be circumvented via `eval` or `importlib`.",
+          "type": [
+            "object",
+            "null"
+          ],
+          "additionalProperties": {
+            "$ref": "#/definitions/BannedApi"
+          }
         }
       },
       "additionalProperties": false

ruff_dev/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ruff_dev"
-version = "0.0.200"
+version = "0.0.205"
 edition = "2021"
 
 [dependencies]
@@ -11,9 +11,9 @@ itertools = { version = "0.10.5" }
 libcst = { git = "https://github.com/charliermarsh/LibCST", rev = "f2f0b7a487a8725d161fe8b3ed73a6758b21e177" }
 once_cell = { version = "1.16.0" }
 ruff = { path = ".." }
-rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "68d26955b3e24198a150315e7959719b03709dee" }
-rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "68d26955b3e24198a150315e7959719b03709dee" }
-rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "68d26955b3e24198a150315e7959719b03709dee" }
+rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "8cb2b8292062adf13bde1b863a9b02c9f0bda3dd" }
+rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "8cb2b8292062adf13bde1b863a9b02c9f0bda3dd" }
+rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "8cb2b8292062adf13bde1b863a9b02c9f0bda3dd" }
 schemars = { version = "0.8.11" }
 serde_json = {version="1.0.91"}
 strum = { version = "0.24.1", features = ["strum_macros"] }

ruff_dev/src/generate_all.rs

@@ -4,8 +4,8 @@ use anyhow::Result;
 use clap::Args;
 
 use crate::{
-    generate_check_code_prefix, generate_json_schema, generate_options,
-    generate_playground_options, generate_rules_table,
+    generate_check_code_prefix, generate_cli_help, generate_json_schema, generate_options,
+    generate_rules_table,
 };
 
 #[derive(Args)]
@@ -28,7 +28,7 @@ pub fn main(cli: &Cli) -> Result<()> {
     generate_options::main(&generate_options::Cli {
         dry_run: cli.dry_run,
     })?;
-    generate_playground_options::main(&generate_playground_options::Cli {
+    generate_cli_help::main(&generate_cli_help::Cli {
         dry_run: cli.dry_run,
     })?;
     Ok(())

ruff_dev/src/generate_cli_help.rs

@@ -0,0 +1,38 @@
+//! Generate CLI help.
+
+use anyhow::Result;
+use clap::{Args, CommandFactory};
+use ruff::cli::Cli as MainCli;
+
+use crate::utils::replace_readme_section;
+
+const HELP_BEGIN_PRAGMA: &str = "<!-- Begin auto-generated cli help. -->";
+const HELP_END_PRAGMA: &str = "<!-- End auto-generated cli help. -->";
+
+#[derive(Args)]
+pub struct Cli {
+    /// Write the generated help to stdout (rather than to `README.md`).
+    #[arg(long)]
+    pub(crate) dry_run: bool,
+}
+
+fn trim_lines(s: &str) -> String {
+    s.lines().map(str::trim_end).collect::<Vec<_>>().join("\n")
+}
+
+pub fn main(cli: &Cli) -> Result<()> {
+    let mut cmd = MainCli::command();
+    let output = trim_lines(cmd.render_help().to_string().trim());
+
+    if cli.dry_run {
+        print!("{output}");
+    } else {
+        replace_readme_section(
+            &format!("```shell\n{output}\n```\n"),
+            HELP_BEGIN_PRAGMA,
+            HELP_END_PRAGMA,
+        )?;
+    }
+
+    Ok(())
+}

ruff_dev/src/generate_options.rs

@@ -1,16 +1,13 @@
 //! Generate a Markdown-compatible listing of configuration options.
 
-use std::fs;
-use std::fs::OpenOptions;
-use std::io::Write;
-use std::path::PathBuf;
-
 use anyhow::Result;
 use clap::Args;
 use itertools::Itertools;
 use ruff::settings::options::Options;
 use ruff::settings::options_base::{ConfigurationOptions, OptionEntry, OptionField};
 
+use crate::utils::replace_readme_section;
+
 const BEGIN_PRAGMA: &str = "<!-- Begin auto-generated options sections. -->";
 const END_PRAGMA: &str = "<!-- End auto-generated options sections. -->";
 
@@ -95,30 +92,7 @@ pub fn main(cli: &Cli) -> Result<()> {
     if cli.dry_run {
         print!("{output}");
     } else {
-        // Read the existing file.
-        let file = PathBuf::from(env!("CARGO_MANIFEST_DIR"))
-            .parent()
-            .expect("Failed to find root directory")
-            .join("README.md");
-        let existing = fs::read_to_string(&file)?;
-
-        // Extract the prefix.
-        let index = existing
-            .find(BEGIN_PRAGMA)
-            .expect("Unable to find begin pragma");
-        let prefix = &existing[..index + BEGIN_PRAGMA.len()];
-
-        // Extract the suffix.
-        let index = existing
-            .find(END_PRAGMA)
-            .expect("Unable to find end pragma");
-        let suffix = &existing[index..];
-
-        // Write the prefix, new contents, and suffix.
-        let mut f = OpenOptions::new().write(true).truncate(true).open(&file)?;
-        write!(f, "{prefix}\n\n")?;
-        write!(f, "{output}")?;
-        write!(f, "{suffix}")?;
+        replace_readme_section(&output, BEGIN_PRAGMA, END_PRAGMA)?;
     }
 
     Ok(())

ruff_dev/src/generate_playground_options.rs

@@ -1,142 +0,0 @@
-//! Generate typescript file defining options to be used by the web playground.
-
-use std::fs::OpenOptions;
-use std::io::Write;
-use std::path::PathBuf;
-
-use anyhow::Result;
-use clap::Args;
-use itertools::Itertools;
-use ruff::settings::options::Options;
-use ruff::settings::options_base::{ConfigurationOptions, OptionEntry, OptionField};
-
-#[derive(Args)]
-pub struct Cli {
-    /// Write the generated table to stdout (rather than to `TODO`).
-    #[arg(long)]
-    pub(crate) dry_run: bool,
-}
-
-fn emit_field(output: &mut String, field: &OptionField) {
-    output.push_str(&textwrap::indent(
-        &textwrap::dedent(&format!(
-            "
-        {{
-            \"name\": \"{}\",
-            \"default\": '{}',
-            \"type\": '{}',
-        }},",
-            field.name, field.default, field.value_type
-        )),
-        "    ",
-    ));
-}
-
-pub fn main(cli: &Cli) -> Result<()> {
-    let mut output = String::new();
-
-    // Generate all the top-level fields.
-    output.push_str(&format!("{{\"name\": \"{}\", \"fields\": [", "globals"));
-    for field in Options::get_available_options()
-        .into_iter()
-        .filter_map(|entry| {
-            if let OptionEntry::Field(field) = entry {
-                Some(field)
-            } else {
-                None
-            }
-        })
-        // Filter out options that don't make sense in the playground.
-        .filter(|field| {
-            !matches!(
-                field.name,
-                "src"
-                    | "fix"
-                    | "format"
-                    | "exclude"
-                    | "extend"
-                    | "extend-exclude"
-                    | "fixable"
-                    | "force-exclude"
-                    | "ignore-init-module-imports"
-                    | "respect-gitignore"
-                    | "show-source"
-                    | "cache-dir"
-                    | "per-file-ignores"
-            )
-        })
-        .sorted_by_key(|field| field.name)
-    {
-        emit_field(&mut output, &field);
-    }
-    output.push_str("\n]},\n");
-
-    // Generate all the sub-groups.
-    for group in Options::get_available_options()
-        .into_iter()
-        .filter_map(|entry| {
-            if let OptionEntry::Group(group) = entry {
-                Some(group)
-            } else {
-                None
-            }
-        })
-        .sorted_by_key(|group| group.name)
-    {
-        output.push_str(&format!("{{\"name\": \"{}\", \"fields\": [", group.name));
-        for field in group
-            .fields
-            .iter()
-            .filter_map(|entry| {
-                if let OptionEntry::Field(field) = entry {
-                    Some(field)
-                } else {
-                    None
-                }
-            })
-            .sorted_by_key(|field| field.name)
-        {
-            emit_field(&mut output, field);
-        }
-        output.push_str("\n]},\n");
-    }
-
-    let prefix = textwrap::dedent(
-        r"
-        // This file is auto-generated by `cargo dev generate-playground-options`.
-        export interface OptionGroup {
-            name: string;
-            fields: {
-                name: string;
-                default: string;
-                type: string;
-            }[];
-        };
-
-        export const AVAILABLE_OPTIONS: OptionGroup[] = [
-    ",
-    );
-    let postfix = "];";
-
-    if cli.dry_run {
-        print!("{output}");
-    } else {
-        let file = PathBuf::from(env!("CARGO_MANIFEST_DIR"))
-            .parent()
-            .expect("Failed to find root directory")
-            .join("playground")
-            .join("src")
-            .join("ruff_options.ts");
-
-        let mut f = OpenOptions::new()
-            .create(true)
-            .write(true)
-            .truncate(true)
-            .open(file)?;
-        write!(f, "{prefix}")?;
-        write!(f, "{}", textwrap::indent(&output, "    "))?;
-        write!(f, "{postfix}")?;
-    }
-
-    Ok(())
-}

ruff_dev/src/generate_rules_table.rs

@@ -1,16 +1,13 @@
 //! Generate a Markdown-compatible table of supported lint rules.
 
-use std::fs;
-use std::fs::OpenOptions;
-use std::io::Write;
-use std::path::PathBuf;
-
 use anyhow::Result;
 use clap::Args;
 use itertools::Itertools;
 use ruff::checks::{CheckCategory, CheckCode};
 use strum::IntoEnumIterator;
 
+use crate::utils::replace_readme_section;
+
 const TABLE_BEGIN_PRAGMA: &str = "<!-- Begin auto-generated sections. -->";
 const TABLE_END_PRAGMA: &str = "<!-- End auto-generated sections. -->";
 
@@ -85,32 +82,3 @@ pub fn main(cli: &Cli) -> Result<()> {
 
     Ok(())
 }
-
-fn replace_readme_section(content: &str, begin_pragma: &str, end_pragma: &str) -> Result<()> {
-    // Read the existing file.
-    let file = PathBuf::from(env!("CARGO_MANIFEST_DIR"))
-        .parent()
-        .expect("Failed to find root directory")
-        .join("README.md");
-    let existing = fs::read_to_string(&file)?;
-
-    // Extract the prefix.
-    let index = existing
-        .find(begin_pragma)
-        .expect("Unable to find begin pragma");
-    let prefix = &existing[..index + begin_pragma.len()];
-
-    // Extract the suffix.
-    let index = existing
-        .find(end_pragma)
-        .expect("Unable to find end pragma");
-    let suffix = &existing[index..];
-
-    // Write the prefix, new contents, and suffix.
-    let mut f = OpenOptions::new().write(true).truncate(true).open(&file)?;
-    writeln!(f, "{prefix}")?;
-    write!(f, "{content}")?;
-    write!(f, "{suffix}")?;
-
-    Ok(())
-}

ruff_dev/src/lib.rs

@@ -13,11 +13,12 @@
 
 pub mod generate_all;
 pub mod generate_check_code_prefix;
+pub mod generate_cli_help;
 pub mod generate_json_schema;
 pub mod generate_options;
-pub mod generate_playground_options;
 pub mod generate_rules_table;
 pub mod print_ast;
 pub mod print_cst;
 pub mod print_tokens;
 pub mod round_trip;
+mod utils;

ruff_dev/src/main.rs

@@ -14,9 +14,8 @@
 use anyhow::Result;
 use clap::{Parser, Subcommand};
 use ruff_dev::{
-    generate_all, generate_check_code_prefix, generate_json_schema, generate_options,
-    generate_playground_options, generate_rules_table, print_ast, print_cst, print_tokens,
-    round_trip,
+    generate_all, generate_check_code_prefix, generate_cli_help, generate_json_schema,
+    generate_options, generate_rules_table, print_ast, print_cst, print_tokens, round_trip,
 };
 
 #[derive(Parser)]
@@ -39,9 +38,8 @@ enum Commands {
     GenerateRulesTable(generate_rules_table::Cli),
     /// Generate a Markdown-compatible listing of configuration options.
     GenerateOptions(generate_options::Cli),
-    /// Generate typescript file defining options to be used by the web
-    /// playground.
-    GeneratePlaygroundOptions(generate_playground_options::Cli),
+    /// Generate CLI help.
+    GenerateCliHelp(generate_cli_help::Cli),
     /// Print the AST for a given Python file.
     PrintAST(print_ast::Cli),
     /// Print the LibCST CST for a given Python file.
@@ -60,7 +58,7 @@ fn main() -> Result<()> {
         Commands::GenerateJSONSchema(args) => generate_json_schema::main(args)?,
         Commands::GenerateRulesTable(args) => generate_rules_table::main(args)?,
         Commands::GenerateOptions(args) => generate_options::main(args)?,
-        Commands::GeneratePlaygroundOptions(args) => generate_playground_options::main(args)?,
+        Commands::GenerateCliHelp(args) => generate_cli_help::main(args)?,
         Commands::PrintAST(args) => print_ast::main(args)?,
         Commands::PrintCST(args) => print_cst::main(args)?,
         Commands::PrintTokens(args) => print_tokens::main(args)?,

ruff_dev/src/round_trip.rs

@@ -22,7 +22,11 @@ pub fn main(cli: &Cli) -> Result<()> {
     let python_ast = parser::parse_program(&contents, &cli.file.to_string_lossy())?;
     let locator = SourceCodeLocator::new(&contents);
     let stylist = SourceCodeStyleDetector::from_contents(&contents, &locator);
-    let mut generator = SourceCodeGenerator::new(stylist.indentation(), stylist.quote());
+    let mut generator = SourceCodeGenerator::new(
+        stylist.indentation(),
+        stylist.quote(),
+        stylist.line_ending(),
+    );
     generator.unparse_suite(&python_ast);
     println!("{}", generator.generate()?);
     Ok(())

ruff_dev/src/utils.rs

@@ -0,0 +1,35 @@
+use std::fs;
+use std::fs::OpenOptions;
+use std::io::Write;
+use std::path::PathBuf;
+
+use anyhow::Result;
+
+pub fn replace_readme_section(content: &str, begin_pragma: &str, end_pragma: &str) -> Result<()> {
+    // Read the existing file.
+    let file = PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+        .parent()
+        .expect("Failed to find root directory")
+        .join("README.md");
+    let existing = fs::read_to_string(&file)?;
+
+    // Extract the prefix.
+    let index = existing
+        .find(begin_pragma)
+        .expect("Unable to find begin pragma");
+    let prefix = &existing[..index + begin_pragma.len()];
+
+    // Extract the suffix.
+    let index = existing
+        .find(end_pragma)
+        .expect("Unable to find end pragma");
+    let suffix = &existing[index..];
+
+    // Write the prefix, new contents, and suffix.
+    let mut f = OpenOptions::new().write(true).truncate(true).open(&file)?;
+    writeln!(f, "{prefix}")?;
+    write!(f, "{content}")?;
+    write!(f, "{suffix}")?;
+
+    Ok(())
+}

ruff_macros/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "ruff_macros"
-version = "0.0.200"
+version = "0.0.205"
 edition = "2021"
 
 [lib]

src/ast/helpers.rs

@@ -5,7 +5,7 @@ use regex::Regex;
 use rustc_hash::{FxHashMap, FxHashSet};
 use rustpython_ast::{
     Arguments, Constant, Excepthandler, ExcepthandlerKind, Expr, ExprKind, Keyword, KeywordData,
-    Location, Stmt, StmtKind,
+    Located, Location, Stmt, StmtKind,
 };
 use rustpython_parser::lexer;
 use rustpython_parser::lexer::Tok;
@@ -395,6 +395,19 @@ pub fn identifier_range(stmt: &Stmt, locator: &SourceCodeLocator) -> Range {
     Range::from_located(stmt)
 }
 
+// Return the ranges of `Name` tokens within a specified node.
+pub fn find_names<T>(located: &Located<T>, locator: &SourceCodeLocator) -> Vec<Range> {
+    let contents = locator.slice_source_code_range(&Range::from_located(located));
+    lexer::make_tokenizer_located(&contents, located.location)
+        .flatten()
+        .filter(|(_, tok, _)| matches!(tok, Tok::Name { .. }))
+        .map(|(start, _, end)| Range {
+            location: start,
+            end_location: end,
+        })
+        .collect()
+}
+
 /// Return the `Range` of `name` in `Excepthandler`.
 pub fn excepthandler_name_range(
     handler: &Excepthandler,
@@ -426,6 +439,64 @@ pub fn excepthandler_name_range(
     }
 }
 
+/// Return the `Range` of `except` in `Excepthandler`.
+pub fn except_range(handler: &Excepthandler, locator: &SourceCodeLocator) -> Range {
+    let ExcepthandlerKind::ExceptHandler { body, type_, .. } = &handler.node;
+    let end = if let Some(type_) = type_ {
+        type_.location
+    } else {
+        body.first()
+            .expect("Expected body to be non-empty")
+            .location
+    };
+    let contents = locator.slice_source_code_range(&Range {
+        location: handler.location,
+        end_location: end,
+    });
+    let range = lexer::make_tokenizer_located(&contents, handler.location)
+        .flatten()
+        .find(|(_, kind, _)| matches!(kind, Tok::Except { .. }))
+        .map(|(location, _, end_location)| Range {
+            location,
+            end_location,
+        })
+        .expect("Failed to find `except` range");
+    range
+}
+
+/// Return the `Range` of `else` in `For`, `AsyncFor`, and `While` statements.
+pub fn else_range(stmt: &Stmt, locator: &SourceCodeLocator) -> Option<Range> {
+    match &stmt.node {
+        StmtKind::For { body, orelse, .. }
+        | StmtKind::AsyncFor { body, orelse, .. }
+        | StmtKind::While { body, orelse, .. }
+            if !orelse.is_empty() =>
+        {
+            let body_end = body
+                .last()
+                .expect("Expected body to be non-empty")
+                .end_location
+                .unwrap();
+            let contents = locator.slice_source_code_range(&Range {
+                location: body_end,
+                end_location: orelse
+                    .first()
+                    .expect("Expected orelse to be non-empty")
+                    .location,
+            });
+            let range = lexer::make_tokenizer_located(&contents, body_end)
+                .flatten()
+                .find(|(_, kind, _)| matches!(kind, Tok::Else))
+                .map(|(location, _, end_location)| Range {
+                    location,
+                    end_location,
+                });
+            range
+        }
+        _ => None,
+    }
+}
+
 /// Return `true` if a `Stmt` appears to be part of a multi-statement line, with
 /// other statements preceding it.
 pub fn preceded_by_continuation(stmt: &Stmt, locator: &SourceCodeLocator) -> bool {
@@ -466,7 +537,9 @@ mod tests {
     use rustpython_ast::Location;
     use rustpython_parser::parser;
 
-    use crate::ast::helpers::{identifier_range, match_module_member, match_trailing_content};
+    use crate::ast::helpers::{
+        else_range, identifier_range, match_module_member, match_trailing_content,
+    };
     use crate::ast::types::Range;
     use crate::source_code_locator::SourceCodeLocator;
 
@@ -738,4 +811,24 @@ class Class():
 
         Ok(())
     }
+
+    #[test]
+    fn test_else_range() -> Result<()> {
+        let contents = r#"
+for x in y:
+    pass
+else:
+    pass
+"#
+        .trim();
+        let program = parser::parse_program(contents, "<filename>")?;
+        let stmt = program.first().unwrap();
+        let locator = SourceCodeLocator::new(contents);
+        let range = else_range(stmt, &locator).unwrap();
+        assert_eq!(range.location.row(), 3);
+        assert_eq!(range.location.column(), 0);
+        assert_eq!(range.end_location.row(), 3);
+        assert_eq!(range.end_location.column(), 4);
+        Ok(())
+    }
 }

src/cache.rs

@@ -15,8 +15,9 @@ use serde::{Deserialize, Serialize};
 use crate::message::Message;
 use crate::settings::{flags, Settings};
 
-static CACHE_DIR: Lazy<Option<String>> = Lazy::new(|| std::env::var("RUFF_CACHE_DIR").ok());
 const CARGO_PKG_VERSION: &str = env!("CARGO_PKG_VERSION");
+static CACHE_DIR: Lazy<Option<String>> = Lazy::new(|| std::env::var("RUFF_CACHE_DIR").ok());
+pub const DEFAULT_CACHE_DIR_NAME: &str = ".ruff_cache";
 
 #[derive(Serialize, Deserialize)]
 struct CacheMetadata {
@@ -40,7 +41,7 @@ struct CheckResult {
 pub fn cache_dir(project_root: &Path) -> PathBuf {
     CACHE_DIR
         .as_ref()
-        .map_or_else(|| project_root.join(".ruff_cache"), PathBuf::from)
+        .map_or_else(|| project_root.join(DEFAULT_CACHE_DIR_NAME), PathBuf::from)
 }
 
 fn content_dir() -> &'static Path {

src/checkers/ast.rs

@@ -39,10 +39,10 @@ use crate::visibility::{module_visibility, transition_scope, Modifier, Visibilit
 use crate::{
     docstrings, flake8_2020, flake8_annotations, flake8_bandit, flake8_blind_except,
     flake8_boolean_trap, flake8_bugbear, flake8_builtins, flake8_comprehensions, flake8_datetimez,
-    flake8_debugger, flake8_errmsg, flake8_import_conventions, flake8_print, flake8_return,
-    flake8_simplify, flake8_tidy_imports, flake8_unused_arguments, mccabe, noqa, pandas_vet,
-    pep8_naming, pycodestyle, pydocstyle, pyflakes, pygrep_hooks, pylint, pyupgrade, ruff,
-    visibility,
+    flake8_debugger, flake8_errmsg, flake8_implicit_str_concat, flake8_import_conventions,
+    flake8_print, flake8_return, flake8_simplify, flake8_tidy_imports, flake8_unused_arguments,
+    mccabe, noqa, pandas_vet, pep8_naming, pycodestyle, pydocstyle, pyflakes, pygrep_hooks, pylint,
+    pyupgrade, ruff, visibility,
 };
 
 const GLOBAL_SCOPE_INDEX: usize = 0;
@@ -87,11 +87,11 @@ pub struct Checker<'a> {
     deferred_assignments: Vec<DeferralContext<'a>>,
     // Internal, derivative state.
     visible_scope: VisibleScope,
-    in_f_string: Option<Range>,
     in_annotation: bool,
     in_type_definition: bool,
     in_deferred_string_type_definition: bool,
     in_deferred_type_definition: bool,
+    in_f_string: bool,
     in_literal: bool,
     in_subscript: bool,
     seen_import_boundary: bool,
@@ -144,11 +144,11 @@ impl<'a> Checker<'a> {
                 modifier: Modifier::Module,
                 visibility: module_visibility(path),
             },
-            in_f_string: None,
             in_annotation: false,
             in_type_definition: false,
             in_deferred_string_type_definition: false,
             in_deferred_type_definition: false,
+            in_f_string: false,
             in_literal: false,
             in_subscript: false,
             seen_import_boundary: false,
@@ -161,14 +161,7 @@ impl<'a> Checker<'a> {
     }
 
     /// Add a `Check` to the `Checker`.
-    pub(crate) fn add_check(&mut self, mut check: Check) {
-        // If we're in an f-string, override the location. RustPython doesn't produce
-        // reliable locations for expressions within f-strings, so we use the
-        // span of the f-string itself as a best-effort default.
-        if let Some(range) = self.in_f_string {
-            check.location = range.location;
-            check.end_location = range.end_location;
-        }
+    pub(crate) fn add_check(&mut self, check: Check) {
         self.checks.push(check);
     }
 
@@ -184,16 +177,7 @@ impl<'a> Checker<'a> {
     pub fn patch(&self, code: &CheckCode) -> bool {
         // TODO(charlie): We can't fix errors in f-strings until RustPython adds
         // location data.
-        matches!(self.autofix, flags::Autofix::Enabled)
-            && self.in_f_string.is_none()
-            && self.settings.fixable.contains(code)
-    }
-
-    /// Return the amended `Range` from a `Located`.
-    pub fn range_for<T>(&self, located: &Located<T>) -> Range {
-        // If we're in an f-string, override the location.
-        self.in_f_string
-            .unwrap_or_else(|| Range::from_located(located))
+        matches!(self.autofix, flags::Autofix::Enabled) && self.settings.fixable.contains(code)
     }
 
     /// Return `true` if the `Expr` is a reference to `typing.${target}`.
@@ -282,16 +266,17 @@ where
         match &stmt.node {
             StmtKind::Global { names } => {
                 let scope_index = *self.scope_stack.last().expect("No current scope found");
+                let ranges = helpers::find_names(stmt, self.locator);
                 if scope_index != GLOBAL_SCOPE_INDEX {
                     // Add the binding to the current scope.
                     let scope = &mut self.scopes[scope_index];
                     let usage = Some((scope.id, Range::from_located(stmt)));
-                    for name in names {
+                    for (name, range) in names.iter().zip(ranges.iter()) {
                         let index = self.bindings.len();
                         self.bindings.push(Binding {
                             kind: BindingKind::Global,
                             used: usage,
-                            range: Range::from_located(stmt),
+                            range: *range,
                             source: Some(RefEquality(stmt)),
                         });
                         scope.values.insert(name, index);
@@ -302,8 +287,9 @@ where
                     self.add_checks(
                         names
                             .iter()
-                            .filter_map(|name| {
-                                pycodestyle::checks::ambiguous_variable_name(name, stmt)
+                            .zip(ranges.iter())
+                            .filter_map(|(name, range)| {
+                                pycodestyle::checks::ambiguous_variable_name(name, *range)
                             })
                             .into_iter(),
                     );
@@ -311,16 +297,17 @@ where
             }
             StmtKind::Nonlocal { names } => {
                 let scope_index = *self.scope_stack.last().expect("No current scope found");
+                let ranges = helpers::find_names(stmt, self.locator);
                 if scope_index != GLOBAL_SCOPE_INDEX {
                     let scope = &mut self.scopes[scope_index];
                     let usage = Some((scope.id, Range::from_located(stmt)));
-                    for name in names {
+                    for (name, range) in names.iter().zip(ranges.iter()) {
                         // Add a binding to the current scope.
                         let index = self.bindings.len();
                         self.bindings.push(Binding {
                             kind: BindingKind::Nonlocal,
                             used: usage,
-                            range: Range::from_located(stmt),
+                            range: *range,
                             source: Some(RefEquality(stmt)),
                         });
                         scope.values.insert(name, index);
@@ -328,7 +315,7 @@ where
 
                     // Mark the binding in the defining scopes as used too. (Skip the global scope
                     // and the current scope.)
-                    for name in names {
+                    for (name, range) in names.iter().zip(ranges.iter()) {
                         let mut exists = false;
                         for index in self.scope_stack.iter().skip(1).rev().skip(1) {
                             if let Some(index) = self.scopes[*index].values.get(&name.as_str()) {
@@ -342,7 +329,7 @@ where
                             if self.settings.enabled.contains(&CheckCode::PLE0117) {
                                 self.add_check(Check::new(
                                     CheckKind::NonlocalWithoutBinding(name.to_string()),
-                                    Range::from_located(stmt),
+                                    *range,
                                 ));
                             }
                         }
@@ -353,8 +340,9 @@ where
                     self.add_checks(
                         names
                             .iter()
-                            .filter_map(|name| {
-                                pycodestyle::checks::ambiguous_variable_name(name, stmt)
+                            .zip(ranges.iter())
+                            .filter_map(|(name, range)| {
+                                pycodestyle::checks::ambiguous_variable_name(name, *range)
                             })
                             .into_iter(),
                     );
@@ -397,10 +385,9 @@ where
                 ..
             } => {
                 if self.settings.enabled.contains(&CheckCode::E743) {
-                    if let Some(check) = pycodestyle::checks::ambiguous_function_name(
-                        name,
-                        Range::from_located(stmt),
-                    ) {
+                    if let Some(check) = pycodestyle::checks::ambiguous_function_name(name, || {
+                        helpers::identifier_range(stmt, self.locator)
+                    }) {
                         self.add_check(check);
                     }
                 }
@@ -551,7 +538,7 @@ where
                     Binding {
                         kind: BindingKind::FunctionDefinition,
                         used: None,
-                        range: Range::from_located(stmt),
+                        range: helpers::identifier_range(stmt, self.locator),
                         source: Some(self.current_stmt().clone()),
                     },
                 );
@@ -585,9 +572,9 @@ where
                 }
 
                 if self.settings.enabled.contains(&CheckCode::E742) {
-                    if let Some(check) =
-                        pycodestyle::checks::ambiguous_class_name(name, Range::from_located(stmt))
-                    {
+                    if let Some(check) = pycodestyle::checks::ambiguous_class_name(name, || {
+                        helpers::identifier_range(stmt, self.locator)
+                    }) {
                         self.add_check(check);
                     }
                 }
@@ -601,9 +588,12 @@ where
                 }
 
                 if self.settings.enabled.contains(&CheckCode::N818) {
-                    if let Some(check) =
-                        pep8_naming::checks::error_suffix_on_exception_name(stmt, bases, name)
-                    {
+                    if let Some(check) = pep8_naming::checks::error_suffix_on_exception_name(
+                        stmt,
+                        bases,
+                        name,
+                        self.locator,
+                    ) {
                         self.add_check(check);
                     }
                 }
@@ -723,6 +713,17 @@ where
                         }
                     }
 
+                    // flake8_tidy_imports
+                    if self.settings.enabled.contains(&CheckCode::TID251) {
+                        if let Some(check) = flake8_tidy_imports::checks::name_or_parent_is_banned(
+                            alias,
+                            &alias.node.name,
+                            &self.settings.flake8_tidy_imports.banned_api,
+                        ) {
+                            self.add_check(check);
+                        }
+                    }
+
                     // pylint
                     if self.settings.enabled.contains(&CheckCode::PLC0414) {
                         pylint::plugins::useless_import_alias(self, alias);
@@ -854,6 +855,27 @@ where
                     }
                 }
 
+                if self.settings.enabled.contains(&CheckCode::TID251) {
+                    if let Some(module) = module {
+                        for name in names {
+                            if let Some(check) = flake8_tidy_imports::checks::name_is_banned(
+                                module,
+                                name,
+                                &self.settings.flake8_tidy_imports.banned_api,
+                            ) {
+                                self.add_check(check);
+                            }
+                        }
+                        if let Some(check) = flake8_tidy_imports::checks::name_or_parent_is_banned(
+                            stmt,
+                            module,
+                            &self.settings.flake8_tidy_imports.banned_api,
+                        ) {
+                            self.add_check(check);
+                        }
+                    }
+                }
+
                 for alias in names {
                     if let Some("__future__") = module.as_deref() {
                         let name = alias.node.asname.as_ref().unwrap_or(&alias.node.name);
@@ -1155,7 +1177,9 @@ where
             }
             StmtKind::Try { handlers, .. } => {
                 if self.settings.enabled.contains(&CheckCode::F707) {
-                    if let Some(check) = pyflakes::checks::default_except_not_last(handlers) {
+                    if let Some(check) =
+                        pyflakes::checks::default_except_not_last(handlers, self.locator)
+                    {
                         self.add_check(check);
                     }
                 }
@@ -1399,7 +1423,7 @@ where
                     Binding {
                         kind: BindingKind::ClassDefinition,
                         used: None,
-                        range: Range::from_located(stmt),
+                        range: helpers::identifier_range(stmt, self.locator),
                         source: Some(self.current_stmt().clone()),
                     },
                 );
@@ -1523,9 +1547,10 @@ where
                     }
                     ExprContext::Store => {
                         if self.settings.enabled.contains(&CheckCode::E741) {
-                            if let Some(check) =
-                                pycodestyle::checks::ambiguous_variable_name(id, expr)
-                            {
+                            if let Some(check) = pycodestyle::checks::ambiguous_variable_name(
+                                id,
+                                Range::from_located(expr),
+                            ) {
                                 self.add_check(check);
                             }
                         }
@@ -1586,6 +1611,15 @@ where
                         };
                     }
                 }
+
+                if self.settings.enabled.contains(&CheckCode::TID251) {
+                    flake8_tidy_imports::checks::banned_attribute_access(
+                        self,
+                        &dealias_call_path(collect_call_paths(expr), &self.import_aliases),
+                        expr,
+                        &self.settings.flake8_tidy_imports.banned_api,
+                    );
+                }
             }
             ExprKind::Call {
                 func,
@@ -1687,7 +1721,7 @@ where
                 if self.settings.enabled.contains(&CheckCode::T201)
                     || self.settings.enabled.contains(&CheckCode::T203)
                 {
-                    flake8_print::plugins::print_call(self, expr, func, keywords);
+                    flake8_print::plugins::print_call(self, func, keywords);
                 }
 
                 // flake8-bugbear
@@ -2125,11 +2159,12 @@ where
                 }
             }
             ExprKind::JoinedStr { values } => {
-                if self.settings.enabled.contains(&CheckCode::F541) {
-                    if self.in_f_string.is_none()
-                        && !values
-                            .iter()
-                            .any(|value| matches!(value.node, ExprKind::FormattedValue { .. }))
+                // Conversion flags are parsed as f-strings without placeholders, so skip
+                // nested f-strings, which would lead to false positives.
+                if !self.in_f_string && self.settings.enabled.contains(&CheckCode::F541) {
+                    if !values
+                        .iter()
+                        .any(|value| matches!(value.node, ExprKind::FormattedValue { .. }))
                     {
                         self.add_check(Check::new(
                             CheckKind::FStringMissingPlaceholders,
@@ -2137,7 +2172,6 @@ where
                         ));
                     }
                 }
-                self.in_f_string = Some(Range::from_located(expr));
             }
             ExprKind::BinOp {
                 left,
@@ -2230,6 +2264,15 @@ where
                     }
                 }
             }
+            ExprKind::BinOp {
+                op: Operator::Add, ..
+            } => {
+                if self.settings.enabled.contains(&CheckCode::ISC003) {
+                    if let Some(check) = flake8_implicit_str_concat::checks::explicit(expr) {
+                        self.add_check(check);
+                    }
+                }
+            }
             ExprKind::UnaryOp { op, operand } => {
                 let check_not_in = self.settings.enabled.contains(&CheckCode::E713);
                 let check_not_is = self.settings.enabled.contains(&CheckCode::E714);
@@ -2329,7 +2372,7 @@ where
             }
             ExprKind::Constant {
                 value: Constant::Str(value),
-                ..
+                kind,
             } => {
                 if self.in_type_definition && !self.in_literal {
                     self.deferred_string_type_definitions.push((
@@ -2347,6 +2390,9 @@ where
                         self.add_check(check);
                     }
                 }
+                if self.settings.enabled.contains(&CheckCode::UP025) {
+                    pyupgrade::plugins::rewrite_unicode_literal(self, expr, kind);
+                }
             }
             ExprKind::Lambda { args, body, .. } => {
                 // Visit the arguments, but avoid the body, which will be deferred.
@@ -2618,6 +2664,11 @@ where
                 }
                 self.in_subscript = prev_in_subscript;
             }
+            ExprKind::JoinedStr { .. } => {
+                self.in_f_string = true;
+                visitor::walk_expr(self, expr);
+                self.in_f_string = prev_in_f_string;
+            }
             _ => visitor::walk_expr(self, expr),
         }
 
@@ -2649,7 +2700,8 @@ where
                     if let Some(check) = pycodestyle::checks::do_not_use_bare_except(
                         type_.as_deref(),
                         body,
-                        Range::from_located(excepthandler),
+                        excepthandler,
+                        self.locator,
                     ) {
                         self.add_check(check);
                     }
@@ -2668,9 +2720,11 @@ where
                 match name {
                     Some(name) => {
                         if self.settings.enabled.contains(&CheckCode::E741) {
-                            if let Some(check) =
-                                pycodestyle::checks::ambiguous_variable_name(name, excepthandler)
-                            {
+                            if let Some(check) = pycodestyle::checks::ambiguous_variable_name(
+                                name,
+                                helpers::excepthandler_name_range(excepthandler, self.locator)
+                                    .expect("Failed to find `name` range"),
+                            ) {
                                 self.add_check(check);
                             }
                         }
@@ -2737,10 +2791,6 @@ where
     }
 
     fn visit_arguments(&mut self, arguments: &'b Arguments) {
-        if self.settings.enabled.contains(&CheckCode::F831) {
-            self.checks
-                .extend(pyflakes::checks::duplicate_arguments(arguments));
-        }
         if self.settings.enabled.contains(&CheckCode::B006) {
             flake8_bugbear::plugins::mutable_argument_default(self, arguments);
         }
@@ -2791,7 +2841,10 @@ where
         );
 
         if self.settings.enabled.contains(&CheckCode::E741) {
-            if let Some(check) = pycodestyle::checks::ambiguous_variable_name(&arg.node.arg, arg) {
+            if let Some(check) = pycodestyle::checks::ambiguous_variable_name(
+                &arg.node.arg,
+                Range::from_located(arg),
+            ) {
                 self.add_check(check);
             }
         }
@@ -3621,7 +3674,22 @@ impl<'a> Checker<'a> {
 
                     let defined_by = binding.source.as_ref().unwrap();
                     let defined_in = self.child_to_parent.get(defined_by);
-                    if self.is_ignored(&CheckCode::F401, binding.range.location.row()) {
+                    let child = defined_by.0;
+
+                    let check_lineno = binding.range.location.row();
+                    let parent_lineno = if matches!(child.node, StmtKind::ImportFrom { .. })
+                        && child.location.row() != check_lineno
+                    {
+                        Some(child.location.row())
+                    } else {
+                        None
+                    };
+
+                    if self.is_ignored(&CheckCode::F401, check_lineno)
+                        || parent_lineno.map_or(false, |parent_lineno| {
+                            self.is_ignored(&CheckCode::F401, parent_lineno)
+                        })
+                    {
                         ignored
                             .entry((defined_by, defined_in))
                             .or_default()
@@ -3668,26 +3736,40 @@ impl<'a> Checker<'a> {
                         None
                     };
 
+                    let multiple = unused_imports.len() > 1;
                     for (full_name, range) in unused_imports {
                         let mut check = Check::new(
-                            CheckKind::UnusedImport(full_name.clone(), ignore_init),
+                            CheckKind::UnusedImport(full_name.clone(), ignore_init, multiple),
                             *range,
                         );
+                        if matches!(child.node, StmtKind::ImportFrom { .. })
+                            && child.location.row() != range.location.row()
+                        {
+                            check.parent(child.location);
+                        }
                         if let Some(fix) = fix.as_ref() {
                             check.amend(fix.clone());
                         }
                         checks.push(check);
                     }
                 }
-                for (_, unused_imports) in ignored
+                for ((defined_by, ..), unused_imports) in ignored
                     .into_iter()
                     .sorted_by_key(|((defined_by, _), _)| defined_by.0.location)
                 {
+                    let child = defined_by.0;
+                    let multiple = unused_imports.len() > 1;
                     for (full_name, range) in unused_imports {
-                        checks.push(Check::new(
-                            CheckKind::UnusedImport(full_name.clone(), ignore_init),
+                        let mut check = Check::new(
+                            CheckKind::UnusedImport(full_name.clone(), ignore_init, multiple),
                             *range,
-                        ));
+                        );
+                        if matches!(child.node, StmtKind::ImportFrom { .. })
+                            && child.location.row() != range.location.row()
+                        {
+                            check.parent(child.location);
+                        }
+                        checks.push(check);
                     }
                 }
             }

src/checkers/imports.rs

@@ -11,11 +11,13 @@ use crate::isort;
 use crate::isort::track::ImportTracker;
 use crate::settings::{flags, Settings};
 use crate::source_code_locator::SourceCodeLocator;
+use crate::source_code_style::SourceCodeStyleDetector;
 
 fn check_import_blocks(
     tracker: ImportTracker,
     locator: &SourceCodeLocator,
     settings: &Settings,
+    stylist: &SourceCodeStyleDetector,
     autofix: flags::Autofix,
     package: Option<&Path>,
 ) -> Vec<Check> {
@@ -23,7 +25,7 @@ fn check_import_blocks(
     for block in tracker.into_iter() {
         if !block.imports.is_empty() {
             if let Some(check) =
-                isort::plugins::check_imports(&block, locator, settings, autofix, package)
+                isort::plugins::check_imports(&block, locator, settings, stylist, autofix, package)
             {
                 checks.push(check);
             }
@@ -32,11 +34,13 @@ fn check_import_blocks(
     checks
 }
 
+#[allow(clippy::too_many_arguments)]
 pub fn check_imports(
     python_ast: &Suite,
     locator: &SourceCodeLocator,
     directives: &IsortDirectives,
     settings: &Settings,
+    stylist: &SourceCodeStyleDetector,
     autofix: flags::Autofix,
     path: &Path,
     package: Option<&Path>,
@@ -45,5 +49,5 @@ pub fn check_imports(
     for stmt in python_ast {
         tracker.visit_stmt(stmt);
     }
-    check_import_blocks(tracker, locator, settings, autofix, package)
+    check_import_blocks(tracker, locator, settings, stylist, autofix, package)
 }

src/checkers/noqa.rs

@@ -25,12 +25,6 @@ pub fn check_noqa(
 
     let enforce_noqa = settings.enabled.contains(&CheckCode::RUF100);
 
-    checks.sort_by_key(|check| check.location);
-    let mut checks_iter = checks.iter().enumerate().peekable();
-    if let Some((_index, check)) = checks_iter.peek() {
-        assert!(check.location.row() >= 1);
-    }
-
     let lines: Vec<&str> = contents.lines().collect();
     for lineno in commented_lines {
         // If we hit an exemption for the entire file, bail.
@@ -44,20 +38,18 @@ pub fn check_noqa(
                 .entry(lineno - 1)
                 .or_insert_with(|| (noqa::extract_noqa_directive(lines[lineno - 1]), vec![]));
         }
+    }
 
-        // Remove any ignored checks.
-        while let Some((index, check)) =
-            checks_iter.next_if(|(_index, check)| check.location.row() <= *lineno)
-        {
-            if check.kind == CheckKind::BlanketNOQA {
-                continue;
-            }
-            // Grab the noqa (logical) line number for the current (physical) line.
-            // If there are newlines at the end of the file, they won't be represented in
-            // `noqa_line_for`, so fallback to the current line.
-            let check_lineno = check.location.row();
-            let noqa_lineno = noqa_line_for.get(&check_lineno).unwrap_or(&check_lineno);
-            if noqa_lineno == lineno {
+    // Remove any ignored checks.
+    for (index, check) in checks.iter().enumerate() {
+        if check.kind == CheckKind::BlanketNOQA {
+            continue;
+        }
+
+        // Is the check ignored by a `noqa` directive on the parent line?
+        if let Some(parent_lineno) = check.parent.map(|location| location.row()) {
+            let noqa_lineno = noqa_line_for.get(&parent_lineno).unwrap_or(&parent_lineno);
+            if commented_lines.contains(noqa_lineno) {
                 let noqa = noqa_directives.entry(noqa_lineno - 1).or_insert_with(|| {
                     (noqa::extract_noqa_directive(lines[noqa_lineno - 1]), vec![])
                 });
@@ -65,17 +57,41 @@ pub fn check_noqa(
                     (Directive::All(..), matches) => {
                         matches.push(check.kind.code().as_ref());
                         ignored.push(index);
+                        continue;
                     }
                     (Directive::Codes(.., codes), matches) => {
                         if noqa::includes(check.kind.code(), codes) {
                             matches.push(check.kind.code().as_ref());
                             ignored.push(index);
+                            continue;
                         }
                     }
                     (Directive::None, ..) => {}
                 }
             }
         }
+
+        // Is the check ignored by a `noqa` directive on the same line?
+        let check_lineno = check.location.row();
+        let noqa_lineno = noqa_line_for.get(&check_lineno).unwrap_or(&check_lineno);
+        if commented_lines.contains(noqa_lineno) {
+            let noqa = noqa_directives
+                .entry(noqa_lineno - 1)
+                .or_insert_with(|| (noqa::extract_noqa_directive(lines[noqa_lineno - 1]), vec![]));
+            match noqa {
+                (Directive::All(..), matches) => {
+                    matches.push(check.kind.code().as_ref());
+                    ignored.push(index);
+                }
+                (Directive::Codes(.., codes), matches) => {
+                    if noqa::includes(check.kind.code(), codes) {
+                        matches.push(check.kind.code().as_ref());
+                        ignored.push(index);
+                    }
+                }
+                (Directive::None, ..) => {}
+            }
+        }
     }
 
     // Enforce that the noqa directive was actually used (RUF100).

src/checkers/tokens.rs

@@ -7,7 +7,7 @@ use crate::lex::docstring_detection::StateMachine;
 use crate::ruff::checks::Context;
 use crate::settings::flags;
 use crate::source_code_locator::SourceCodeLocator;
-use crate::{eradicate, flake8_quotes, pycodestyle, ruff, Settings};
+use crate::{eradicate, flake8_implicit_str_concat, flake8_quotes, pycodestyle, ruff, Settings};
 
 pub fn check_tokens(
     locator: &SourceCodeLocator,
@@ -26,6 +26,8 @@ pub fn check_tokens(
         || settings.enabled.contains(&CheckCode::Q003);
     let enforce_commented_out_code = settings.enabled.contains(&CheckCode::ERA001);
     let enforce_invalid_escape_sequence = settings.enabled.contains(&CheckCode::W605);
+    let enforce_implicit_string_concatenation = settings.enabled.contains(&CheckCode::ISC001)
+        || settings.enabled.contains(&CheckCode::ISC002);
 
     let mut state_machine = StateMachine::default();
     for &(start, ref tok, end) in tokens.iter().flatten() {
@@ -99,5 +101,14 @@ pub fn check_tokens(
         }
     }
 
+    // ISC001, ISC002
+    if enforce_implicit_string_concatenation {
+        checks.extend(
+            flake8_implicit_str_concat::checks::implicit(tokens, locator)
+                .into_iter()
+                .filter(|check| settings.enabled.contains(check.kind.code())),
+        );
+    }
+
     checks
 }

src/checks.rs

@@ -3,6 +3,7 @@ use std::fmt;
 use itertools::Itertools;
 use once_cell::sync::Lazy;
 use rustc_hash::FxHashMap;
+use rustpython_ast::Cmpop;
 use rustpython_parser::ast::Location;
 use serde::{Deserialize, Serialize};
 use strum_macros::{AsRefStr, Display, EnumIter, EnumString};
@@ -91,7 +92,6 @@ pub enum CheckCode {
     F821,
     F822,
     F823,
-    F831,
     F841,
     F842,
     F901,
@@ -165,6 +165,7 @@ pub enum CheckCode {
     // mccabe
     C901,
     // flake8-tidy-imports
+    TID251,
     TID252,
     // flake8-return
     RET501,
@@ -175,6 +176,10 @@ pub enum CheckCode {
     RET506,
     RET507,
     RET508,
+    // flake8-implicit-str-concat
+    ISC001,
+    ISC002,
+    ISC003,
     // flake8-print
     T201,
     T203,
@@ -231,6 +236,7 @@ pub enum CheckCode {
     UP021,
     UP022,
     UP023,
+    UP025,
     // pydocstyle
     D100,
     D101,
@@ -375,6 +381,7 @@ pub enum CheckCategory {
     Flake8Comprehensions,
     Flake8Debugger,
     Flake8ErrMsg,
+    Flake8ImplicitStrConcat,
     Flake8ImportConventions,
     Flake8Print,
     Flake8Quotes,
@@ -418,6 +425,7 @@ impl CheckCategory {
             CheckCategory::Flake8Comprehensions => "flake8-comprehensions",
             CheckCategory::Flake8Debugger => "flake8-debugger",
             CheckCategory::Flake8ErrMsg => "flake8-errmsg",
+            CheckCategory::Flake8ImplicitStrConcat => "flake8-implicit-str-concat",
             CheckCategory::Flake8ImportConventions => "flake8-import-conventions",
             CheckCategory::Flake8Print => "flake8-print",
             CheckCategory::Flake8Quotes => "flake8-quotes",
@@ -451,19 +459,21 @@ impl CheckCategory {
             CheckCategory::Flake8Bugbear => vec![CheckCodePrefix::B],
             CheckCategory::Flake8Builtins => vec![CheckCodePrefix::A],
             CheckCategory::Flake8Comprehensions => vec![CheckCodePrefix::C4],
+            CheckCategory::Flake8Datetimez => vec![CheckCodePrefix::DTZ],
             CheckCategory::Flake8Debugger => vec![CheckCodePrefix::T10],
             CheckCategory::Flake8ErrMsg => vec![CheckCodePrefix::EM],
+            CheckCategory::Flake8ImplicitStrConcat => vec![CheckCodePrefix::ISC],
+            CheckCategory::Flake8ImportConventions => vec![CheckCodePrefix::ICN],
             CheckCategory::Flake8Print => vec![CheckCodePrefix::T20],
             CheckCategory::Flake8Quotes => vec![CheckCodePrefix::Q],
             CheckCategory::Flake8Return => vec![CheckCodePrefix::RET],
             CheckCategory::Flake8Simplify => vec![CheckCodePrefix::SIM],
             CheckCategory::Flake8TidyImports => vec![CheckCodePrefix::TID],
             CheckCategory::Flake8UnusedArguments => vec![CheckCodePrefix::ARG],
-            CheckCategory::Flake8Datetimez => vec![CheckCodePrefix::DTZ],
             CheckCategory::Isort => vec![CheckCodePrefix::I],
             CheckCategory::McCabe => vec![CheckCodePrefix::C90],
-            CheckCategory::PandasVet => vec![CheckCodePrefix::PD],
             CheckCategory::PEP8Naming => vec![CheckCodePrefix::N],
+            CheckCategory::PandasVet => vec![CheckCodePrefix::PD],
             CheckCategory::Pycodestyle => vec![CheckCodePrefix::E, CheckCodePrefix::W],
             CheckCategory::Pydocstyle => vec![CheckCodePrefix::D],
             CheckCategory::Pyflakes => vec![CheckCodePrefix::F],
@@ -475,7 +485,6 @@ impl CheckCategory {
                 CheckCodePrefix::PLW,
             ],
             CheckCategory::Pyupgrade => vec![CheckCodePrefix::UP],
-            CheckCategory::Flake8ImportConventions => vec![CheckCodePrefix::ICN],
             CheckCategory::Ruff => vec![CheckCodePrefix::RUF],
         }
     }
@@ -525,6 +534,10 @@ impl CheckCategory {
                 "https://pypi.org/project/flake8-errmsg/0.4.0/",
                 &Platform::PyPI,
             )),
+            CheckCategory::Flake8ImplicitStrConcat => Some((
+                "https://pypi.org/project/flake8-implicit-str-concat/0.3.0/",
+                &Platform::PyPI,
+            )),
             CheckCategory::Flake8ImportConventions => None,
             CheckCategory::Flake8Print => Some((
                 "https://pypi.org/project/flake8-print/5.0.0/",
@@ -605,11 +618,37 @@ pub enum LintSource {
 }
 
 #[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
-pub enum RejectedCmpop {
+pub enum EqCmpop {
     Eq,
     NotEq,
 }
 
+impl From<&Cmpop> for EqCmpop {
+    fn from(cmpop: &Cmpop) -> Self {
+        match cmpop {
+            Cmpop::Eq => EqCmpop::Eq,
+            Cmpop::NotEq => EqCmpop::NotEq,
+            _ => unreachable!("Expected Cmpop::Eq | Cmpop::NotEq"),
+        }
+    }
+}
+
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub enum IsCmpop {
+    Is,
+    IsNot,
+}
+
+impl From<&Cmpop> for IsCmpop {
+    fn from(cmpop: &Cmpop) -> Self {
+        match cmpop {
+            Cmpop::Is => IsCmpop::Is,
+            Cmpop::IsNot => IsCmpop::IsNot,
+            _ => unreachable!("Expected Cmpop::Is | Cmpop::IsNot"),
+        }
+    }
+}
+
 #[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub enum DeferralKeyword {
     Yield,
@@ -642,6 +681,21 @@ impl fmt::Display for Branch {
     }
 }
 
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub enum LiteralType {
+    Str,
+    Bytes,
+}
+
+impl fmt::Display for LiteralType {
+    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            LiteralType::Str => fmt.write_str("str"),
+            LiteralType::Bytes => fmt.write_str("bytes"),
+        }
+    }
+}
+
 #[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub struct UnusedCodes {
     pub unknown: Vec<String>,
@@ -655,17 +709,17 @@ pub enum CheckKind {
     AmbiguousClassName(String),
     AmbiguousFunctionName(String),
     AmbiguousVariableName(String),
-    DoNotAssignLambda,
+    DoNotAssignLambda(String),
     DoNotUseBareExcept,
     IOError(String),
     LineTooLong(usize, usize),
     ModuleImportNotAtTopOfFile,
     MultipleImportsOnOneLine,
-    NoneComparison(RejectedCmpop),
+    NoneComparison(EqCmpop),
     NotInTest,
     NotIsTest,
     SyntaxError(String),
-    TrueFalseComparison(bool, RejectedCmpop),
+    TrueFalseComparison(bool, EqCmpop),
     TypeComparison,
     // pycodestyle warnings
     NoNewLineAtEndOfFile,
@@ -675,7 +729,6 @@ pub enum CheckKind {
     BreakOutsideLoop,
     ContinueOutsideLoop,
     DefaultExceptNotLast,
-    DuplicateArgumentName,
     ExpressionsInStarAssignment,
     FStringMissingPlaceholders,
     ForwardAnnotationSyntaxError(String),
@@ -686,7 +739,7 @@ pub enum CheckKind {
     ImportStarUsage(String, Vec<String>),
     ImportStarUsed(String),
     InvalidPrintSyntax,
-    IsLiteral,
+    IsLiteral(IsCmpop),
     LateFutureImport,
     MultiValueRepeatedKeyLiteral,
     MultiValueRepeatedKeyVariable(String),
@@ -712,7 +765,7 @@ pub enum CheckKind {
     UndefinedLocal(String),
     UnusedAnnotation(String),
     UndefinedName(String),
-    UnusedImport(String, bool),
+    UnusedImport(String, bool, bool),
     UnusedVariable(String),
     YieldOutsideFunction(DeferralKeyword),
     // pylint
@@ -783,6 +836,7 @@ pub enum CheckKind {
     // flake8-debugger
     Debugger(DebuggerUsingType),
     // flake8-tidy-imports
+    BannedApi { name: String, message: String },
     BannedRelativeImport(Strictness),
     // flake8-return
     UnnecessaryReturnNone,
@@ -793,6 +847,10 @@ pub enum CheckKind {
     SuperfluousElseRaise(Branch),
     SuperfluousElseContinue(Branch),
     SuperfluousElseBreak(Branch),
+    // flake8-implicit-str-concat
+    SingleLineImplicitStringConcatenation,
+    MultiLineImplicitStringConcatenation,
+    ExplicitStringConcatenation,
     // flake8-print
     PrintFound,
     PPrintFound,
@@ -841,14 +899,15 @@ pub enum CheckKind {
     UnnecessaryEncodeUTF8,
     ConvertTypedDictFunctionalToClass(String),
     ConvertNamedTupleFunctionalToClass(String),
-    RedundantOpenModes,
+    RedundantOpenModes(Option<String>),
     RemoveSixCompat,
     DatetimeTimezoneUTC,
-    NativeLiterals,
+    NativeLiterals(LiteralType),
     OpenAlias,
     ReplaceUniversalNewlines,
     ReplaceStdoutStderr,
     RewriteCElementTree,
+    RewriteUnicodeLiteral,
     // pydocstyle
     BlankLineAfterLastSection(String),
     BlankLineAfterSection(String),
@@ -988,6 +1047,8 @@ impl CheckCode {
             | CheckCode::PGH003
             | CheckCode::PGH004 => &LintSource::Lines,
             CheckCode::ERA001
+            | CheckCode::ISC001
+            | CheckCode::ISC002
             | CheckCode::Q000
             | CheckCode::Q001
             | CheckCode::Q002
@@ -1009,13 +1070,13 @@ impl CheckCode {
             CheckCode::E401 => CheckKind::MultipleImportsOnOneLine,
             CheckCode::E402 => CheckKind::ModuleImportNotAtTopOfFile,
             CheckCode::E501 => CheckKind::LineTooLong(89, 88),
-            CheckCode::E711 => CheckKind::NoneComparison(RejectedCmpop::Eq),
-            CheckCode::E712 => CheckKind::TrueFalseComparison(true, RejectedCmpop::Eq),
+            CheckCode::E711 => CheckKind::NoneComparison(EqCmpop::Eq),
+            CheckCode::E712 => CheckKind::TrueFalseComparison(true, EqCmpop::Eq),
             CheckCode::E713 => CheckKind::NotInTest,
             CheckCode::E714 => CheckKind::NotIsTest,
             CheckCode::E721 => CheckKind::TypeComparison,
             CheckCode::E722 => CheckKind::DoNotUseBareExcept,
-            CheckCode::E731 => CheckKind::DoNotAssignLambda,
+            CheckCode::E731 => CheckKind::DoNotAssignLambda("...".to_string()),
             CheckCode::E741 => CheckKind::AmbiguousVariableName("...".to_string()),
             CheckCode::E742 => CheckKind::AmbiguousClassName("...".to_string()),
             CheckCode::E743 => CheckKind::AmbiguousFunctionName("...".to_string()),
@@ -1025,7 +1086,7 @@ impl CheckCode {
             CheckCode::W292 => CheckKind::NoNewLineAtEndOfFile,
             CheckCode::W605 => CheckKind::InvalidEscapeSequence('c'),
             // pyflakes
-            CheckCode::F401 => CheckKind::UnusedImport("...".to_string(), false),
+            CheckCode::F401 => CheckKind::UnusedImport("...".to_string(), false, false),
             CheckCode::F402 => CheckKind::ImportShadowedByLoopVar("...".to_string(), 1),
             CheckCode::F403 => CheckKind::ImportStarUsed("...".to_string()),
             CheckCode::F404 => CheckKind::LateFutureImport,
@@ -1058,7 +1119,7 @@ impl CheckCode {
             CheckCode::F621 => CheckKind::ExpressionsInStarAssignment,
             CheckCode::F622 => CheckKind::TwoStarredExpressions,
             CheckCode::F631 => CheckKind::AssertTuple,
-            CheckCode::F632 => CheckKind::IsLiteral,
+            CheckCode::F632 => CheckKind::IsLiteral(IsCmpop::Is),
             CheckCode::F633 => CheckKind::InvalidPrintSyntax,
             CheckCode::F634 => CheckKind::IfTuple,
             CheckCode::F701 => CheckKind::BreakOutsideLoop,
@@ -1071,7 +1132,6 @@ impl CheckCode {
             CheckCode::F821 => CheckKind::UndefinedName("...".to_string()),
             CheckCode::F822 => CheckKind::UndefinedExport("...".to_string()),
             CheckCode::F823 => CheckKind::UndefinedLocal("...".to_string()),
-            CheckCode::F831 => CheckKind::DuplicateArgumentName,
             CheckCode::F841 => CheckKind::UnusedVariable("...".to_string()),
             CheckCode::F842 => CheckKind::UnusedAnnotation("...".to_string()),
             CheckCode::F901 => CheckKind::RaiseNotImplemented,
@@ -1162,6 +1222,10 @@ impl CheckCode {
             // flake8-debugger
             CheckCode::T100 => CheckKind::Debugger(DebuggerUsingType::Import("...".to_string())),
             // flake8-tidy-imports
+            CheckCode::TID251 => CheckKind::BannedApi {
+                name: "...".to_string(),
+                message: "...".to_string(),
+            },
             CheckCode::TID252 => CheckKind::BannedRelativeImport(Strictness::All),
             // flake8-return
             CheckCode::RET501 => CheckKind::UnnecessaryReturnNone,
@@ -1172,6 +1236,10 @@ impl CheckCode {
             CheckCode::RET506 => CheckKind::SuperfluousElseRaise(Branch::Else),
             CheckCode::RET507 => CheckKind::SuperfluousElseContinue(Branch::Else),
             CheckCode::RET508 => CheckKind::SuperfluousElseBreak(Branch::Else),
+            // flake8-implicit-str-concat
+            CheckCode::ISC001 => CheckKind::SingleLineImplicitStringConcatenation,
+            CheckCode::ISC002 => CheckKind::MultiLineImplicitStringConcatenation,
+            CheckCode::ISC003 => CheckKind::ExplicitStringConcatenation,
             // flake8-print
             CheckCode::T201 => CheckKind::PrintFound,
             CheckCode::T203 => CheckKind::PPrintFound,
@@ -1224,15 +1292,16 @@ impl CheckCode {
             CheckCode::UP012 => CheckKind::UnnecessaryEncodeUTF8,
             CheckCode::UP013 => CheckKind::ConvertTypedDictFunctionalToClass("...".to_string()),
             CheckCode::UP014 => CheckKind::ConvertNamedTupleFunctionalToClass("...".to_string()),
-            CheckCode::UP015 => CheckKind::RedundantOpenModes,
+            CheckCode::UP015 => CheckKind::RedundantOpenModes(None),
             CheckCode::UP016 => CheckKind::RemoveSixCompat,
             CheckCode::UP017 => CheckKind::DatetimeTimezoneUTC,
-            CheckCode::UP018 => CheckKind::NativeLiterals,
+            CheckCode::UP018 => CheckKind::NativeLiterals(LiteralType::Str),
             CheckCode::UP019 => CheckKind::TypingTextStrAlias,
             CheckCode::UP020 => CheckKind::OpenAlias,
             CheckCode::UP021 => CheckKind::ReplaceUniversalNewlines,
             CheckCode::UP022 => CheckKind::ReplaceStdoutStderr,
             CheckCode::UP023 => CheckKind::RewriteCElementTree,
+            CheckCode::UP025 => CheckKind::RewriteUnicodeLiteral,
             // pydocstyle
             CheckCode::D100 => CheckKind::PublicModule,
             CheckCode::D101 => CheckKind::PublicClass,
@@ -1559,7 +1628,6 @@ impl CheckCode {
             CheckCode::F821 => CheckCategory::Pyflakes,
             CheckCode::F822 => CheckCategory::Pyflakes,
             CheckCode::F823 => CheckCategory::Pyflakes,
-            CheckCode::F831 => CheckCategory::Pyflakes,
             CheckCode::F841 => CheckCategory::Pyflakes,
             CheckCode::F842 => CheckCategory::Pyflakes,
             CheckCode::F901 => CheckCategory::Pyflakes,
@@ -1567,8 +1635,10 @@ impl CheckCode {
             CheckCode::FBT002 => CheckCategory::Flake8BooleanTrap,
             CheckCode::FBT003 => CheckCategory::Flake8BooleanTrap,
             CheckCode::I001 => CheckCategory::Isort,
-            CheckCode::TID252 => CheckCategory::Flake8TidyImports,
             CheckCode::ICN001 => CheckCategory::Flake8ImportConventions,
+            CheckCode::ISC001 => CheckCategory::Flake8ImplicitStrConcat,
+            CheckCode::ISC002 => CheckCategory::Flake8ImplicitStrConcat,
+            CheckCode::ISC003 => CheckCategory::Flake8ImplicitStrConcat,
             CheckCode::N801 => CheckCategory::PEP8Naming,
             CheckCode::N802 => CheckCategory::PEP8Naming,
             CheckCode::N803 => CheckCategory::PEP8Naming,
@@ -1639,6 +1709,8 @@ impl CheckCode {
             CheckCode::T100 => CheckCategory::Flake8Debugger,
             CheckCode::T201 => CheckCategory::Flake8Print,
             CheckCode::T203 => CheckCategory::Flake8Print,
+            CheckCode::TID251 => CheckCategory::Flake8TidyImports,
+            CheckCode::TID252 => CheckCategory::Flake8TidyImports,
             CheckCode::UP001 => CheckCategory::Pyupgrade,
             CheckCode::UP003 => CheckCategory::Pyupgrade,
             CheckCode::UP004 => CheckCategory::Pyupgrade,
@@ -1661,6 +1733,7 @@ impl CheckCode {
             CheckCode::UP021 => CheckCategory::Pyupgrade,
             CheckCode::UP022 => CheckCategory::Pyupgrade,
             CheckCode::UP023 => CheckCategory::Pyupgrade,
+            CheckCode::UP025 => CheckCategory::Pyupgrade,
             CheckCode::W292 => CheckCategory::Pycodestyle,
             CheckCode::W605 => CheckCategory::Pycodestyle,
             CheckCode::YTT101 => CheckCategory::Flake82020,
@@ -1689,9 +1762,8 @@ impl CheckKind {
             CheckKind::BreakOutsideLoop => &CheckCode::F701,
             CheckKind::ContinueOutsideLoop => &CheckCode::F702,
             CheckKind::DefaultExceptNotLast => &CheckCode::F707,
-            CheckKind::DoNotAssignLambda => &CheckCode::E731,
+            CheckKind::DoNotAssignLambda(..) => &CheckCode::E731,
             CheckKind::DoNotUseBareExcept => &CheckCode::E722,
-            CheckKind::DuplicateArgumentName => &CheckCode::F831,
             CheckKind::FStringMissingPlaceholders => &CheckCode::F541,
             CheckKind::ForwardAnnotationSyntaxError(..) => &CheckCode::F722,
             CheckKind::FutureFeatureNotDefined(..) => &CheckCode::F407,
@@ -1702,7 +1774,7 @@ impl CheckKind {
             CheckKind::ImportStarUsage(..) => &CheckCode::F405,
             CheckKind::ImportStarUsed(..) => &CheckCode::F403,
             CheckKind::InvalidPrintSyntax => &CheckCode::F633,
-            CheckKind::IsLiteral => &CheckCode::F632,
+            CheckKind::IsLiteral(..) => &CheckCode::F632,
             CheckKind::LateFutureImport => &CheckCode::F404,
             CheckKind::LineTooLong(..) => &CheckCode::E501,
             CheckKind::MultipleImportsOnOneLine => &CheckCode::E401,
@@ -1812,6 +1884,7 @@ impl CheckKind {
             // flake8-debugger
             CheckKind::Debugger(..) => &CheckCode::T100,
             // flake8-tidy-imports
+            CheckKind::BannedApi { .. } => &CheckCode::TID251,
             CheckKind::BannedRelativeImport(..) => &CheckCode::TID252,
             // flake8-return
             CheckKind::UnnecessaryReturnNone => &CheckCode::RET501,
@@ -1822,6 +1895,10 @@ impl CheckKind {
             CheckKind::SuperfluousElseRaise(..) => &CheckCode::RET506,
             CheckKind::SuperfluousElseContinue(..) => &CheckCode::RET507,
             CheckKind::SuperfluousElseBreak(..) => &CheckCode::RET508,
+            // flake8-implicit-str-concat
+            CheckKind::SingleLineImplicitStringConcatenation => &CheckCode::ISC001,
+            CheckKind::MultiLineImplicitStringConcatenation => &CheckCode::ISC002,
+            CheckKind::ExplicitStringConcatenation => &CheckCode::ISC003,
             // flake8-print
             CheckKind::PrintFound => &CheckCode::T201,
             CheckKind::PPrintFound => &CheckCode::T203,
@@ -1869,15 +1946,16 @@ impl CheckKind {
             CheckKind::UnnecessaryEncodeUTF8 => &CheckCode::UP012,
             CheckKind::ConvertTypedDictFunctionalToClass(..) => &CheckCode::UP013,
             CheckKind::ConvertNamedTupleFunctionalToClass(..) => &CheckCode::UP014,
-            CheckKind::RedundantOpenModes => &CheckCode::UP015,
+            CheckKind::RedundantOpenModes(..) => &CheckCode::UP015,
             CheckKind::RemoveSixCompat => &CheckCode::UP016,
             CheckKind::DatetimeTimezoneUTC => &CheckCode::UP017,
-            CheckKind::NativeLiterals => &CheckCode::UP018,
+            CheckKind::NativeLiterals(..) => &CheckCode::UP018,
             CheckKind::TypingTextStrAlias => &CheckCode::UP019,
             CheckKind::OpenAlias => &CheckCode::UP020,
             CheckKind::ReplaceUniversalNewlines => &CheckCode::UP021,
             CheckKind::ReplaceStdoutStderr => &CheckCode::UP022,
             CheckKind::RewriteCElementTree => &CheckCode::UP023,
+            CheckKind::RewriteUnicodeLiteral => &CheckCode::UP025,
             // pydocstyle
             CheckKind::BlankLineAfterLastSection(..) => &CheckCode::D413,
             CheckKind::BlankLineAfterSection(..) => &CheckCode::D410,
@@ -2027,13 +2105,10 @@ impl CheckKind {
             CheckKind::DefaultExceptNotLast => {
                 "An `except` block as not the last exception handler".to_string()
             }
-            CheckKind::DoNotAssignLambda => {
-                "Do not assign a lambda expression, use a def".to_string()
+            CheckKind::DoNotAssignLambda(..) => {
+                "Do not assign a `lambda` expression, use a `def`".to_string()
             }
             CheckKind::DoNotUseBareExcept => "Do not use bare `except`".to_string(),
-            CheckKind::DuplicateArgumentName => {
-                "Duplicate argument name in function definition".to_string()
-            }
             CheckKind::ForwardAnnotationSyntaxError(body) => {
                 format!("Syntax error in forward annotation: `{body}`")
             }
@@ -2064,7 +2139,10 @@ impl CheckKind {
                     .join(", ");
                 format!("`{name}` may be undefined, or defined from star imports: {sources}")
             }
-            CheckKind::IsLiteral => "Use `==` and `!=` to compare constant literals".to_string(),
+            CheckKind::IsLiteral(cmpop) => match cmpop {
+                IsCmpop::Is => "Use `==` to compare constant literals".to_string(),
+                IsCmpop::IsNot => "Use `!=` to compare constant literals".to_string(),
+            },
             CheckKind::LateFutureImport => {
                 "`from __future__` imports must occur at the beginning of the file".to_string()
             }
@@ -2082,10 +2160,8 @@ impl CheckKind {
                 format!("Dictionary key `{name}` repeated")
             }
             CheckKind::NoneComparison(op) => match op {
-                RejectedCmpop::Eq => "Comparison to `None` should be `cond is None`".to_string(),
-                RejectedCmpop::NotEq => {
-                    "Comparison to `None` should be `cond is not None`".to_string()
-                }
+                EqCmpop::Eq => "Comparison to `None` should be `cond is None`".to_string(),
+                EqCmpop::NotEq => "Comparison to `None` should be `cond is not None`".to_string(),
             },
             CheckKind::NotInTest => "Test for membership should be `not in`".to_string(),
             CheckKind::NotIsTest => "Test for object identity should be `is not`".to_string(),
@@ -2149,16 +2225,16 @@ impl CheckKind {
             CheckKind::ExpressionsInStarAssignment => {
                 "Too many expressions in star-unpacking assignment".to_string()
             }
-            CheckKind::TrueFalseComparison(true, RejectedCmpop::Eq) => {
+            CheckKind::TrueFalseComparison(true, EqCmpop::Eq) => {
                 "Comparison to `True` should be `cond is True`".to_string()
             }
-            CheckKind::TrueFalseComparison(true, RejectedCmpop::NotEq) => {
+            CheckKind::TrueFalseComparison(true, EqCmpop::NotEq) => {
                 "Comparison to `True` should be `cond is not True`".to_string()
             }
-            CheckKind::TrueFalseComparison(false, RejectedCmpop::Eq) => {
+            CheckKind::TrueFalseComparison(false, EqCmpop::Eq) => {
                 "Comparison to `False` should be `cond is False`".to_string()
             }
-            CheckKind::TrueFalseComparison(false, RejectedCmpop::NotEq) => {
+            CheckKind::TrueFalseComparison(false, EqCmpop::NotEq) => {
                 "Comparison to `False` should be `cond is not False`".to_string()
             }
             CheckKind::TwoStarredExpressions => "Two starred expressions in assignment".to_string(),
@@ -2175,7 +2251,7 @@ impl CheckKind {
             CheckKind::UnusedAnnotation(name) => {
                 format!("Local variable `{name}` is annotated but never used")
             }
-            CheckKind::UnusedImport(name, ignore_init) => {
+            CheckKind::UnusedImport(name, ignore_init, ..) => {
                 if *ignore_init {
                     format!(
                         "`{name}` imported but unused; consider adding to `__all__` or using a \
@@ -2439,6 +2515,7 @@ impl CheckKind {
                 DebuggerUsingType::Import(name) => format!("Import for `{name}` found"),
             },
             // flake8-tidy-imports
+            CheckKind::BannedApi { name, message } => format!("`{name}` is banned: {message}"),
             CheckKind::BannedRelativeImport(strictness) => match strictness {
                 Strictness::Parents => {
                     "Relative imports from parent modules are banned".to_string()
@@ -2470,6 +2547,16 @@ impl CheckKind {
             CheckKind::SuperfluousElseBreak(branch) => {
                 format!("Unnecessary `{branch}` after `break` statement")
             }
+            // flake8-implicit-str-concat
+            CheckKind::SingleLineImplicitStringConcatenation => {
+                "Implicitly concatenated string literals on one line".to_string()
+            }
+            CheckKind::MultiLineImplicitStringConcatenation => {
+                "Implicitly concatenated string literals over continuation line".to_string()
+            }
+            CheckKind::ExplicitStringConcatenation => {
+                "Explicitly concatenated string should be implicitly concatenated".to_string()
+            }
             // flake8-print
             CheckKind::PrintFound => "`print` found".to_string(),
             CheckKind::PPrintFound => "`pprint` found".to_string(),
@@ -2575,7 +2662,7 @@ impl CheckKind {
                 format!("`{alias}` is deprecated, use `{target}`")
             }
             CheckKind::UselessObjectInheritance(name) => {
-                format!("Class `{name}` inherits from object")
+                format!("Class `{name}` inherits from `object`")
             }
             CheckKind::UsePEP585Annotation(name) => {
                 format!(
@@ -2601,14 +2688,24 @@ impl CheckKind {
                 "Unnecessary parameters to `functools.lru_cache`".to_string()
             }
             CheckKind::UnnecessaryEncodeUTF8 => "Unnecessary call to `encode` as UTF-8".to_string(),
-            CheckKind::RedundantOpenModes => "Unnecessary open mode parameters".to_string(),
+            CheckKind::RedundantOpenModes(replacement) => match replacement {
+                None => "Unnecessary open mode parameters".to_string(),
+                Some(replacement) => {
+                    format!("Unnecessary open mode parameters, use \"{replacement}\"")
+                }
+            },
             CheckKind::RemoveSixCompat => "Unnecessary `six` compatibility usage".to_string(),
             CheckKind::DatetimeTimezoneUTC => "Use `datetime.UTC` alias".to_string(),
-            CheckKind::NativeLiterals => "Unnecessary call to `str` and `bytes`".to_string(),
+            CheckKind::NativeLiterals(literal_type) => {
+                format!("Unnecessary call to `{literal_type}`")
+            }
             CheckKind::OpenAlias => "Use builtin `open`".to_string(),
             CheckKind::ConvertTypedDictFunctionalToClass(name) => {
                 format!("Convert `{name}` from `TypedDict` functional to class syntax")
             }
+            CheckKind::ConvertNamedTupleFunctionalToClass(name) => {
+                format!("Convert `{name}` from `NamedTuple` functional to class syntax")
+            }
             CheckKind::ReplaceUniversalNewlines => {
                 "`universal_newlines` is deprecated, use `text`".to_string()
             }
@@ -2618,9 +2715,7 @@ impl CheckKind {
             CheckKind::RewriteCElementTree => {
                 "`cElementTree` is deprecated, use `ElementTree`".to_string()
             }
-            CheckKind::ConvertNamedTupleFunctionalToClass(name) => {
-                format!("Convert `{name}` from `NamedTuple` functional to class syntax")
-            }
+            CheckKind::RewriteUnicodeLiteral => "Remove unicode literals from strings".to_string(),
             // pydocstyle
             CheckKind::FitsOnOneLine => "One-line docstring should fit on one line".to_string(),
             CheckKind::BlankLineAfterSummary => {
@@ -2797,14 +2892,13 @@ impl CheckKind {
             CheckKind::HardcodedBindAllInterfaces => {
                 "Possible binding to all interfaces".to_string()
             }
-            CheckKind::HardcodedPasswordString(string) => {
-                format!("Possible hardcoded password: `\"{string}\"`")
-            }
-            CheckKind::HardcodedPasswordFuncArg(string) => {
-                format!("Possible hardcoded password: `\"{string}\"`")
-            }
-            CheckKind::HardcodedPasswordDefault(string) => {
-                format!("Possible hardcoded password: `\"{string}\"`")
+            CheckKind::HardcodedPasswordString(string)
+            | CheckKind::HardcodedPasswordFuncArg(string)
+            | CheckKind::HardcodedPasswordDefault(string) => {
+                format!(
+                    "Possible hardcoded password: `\"{}\"`",
+                    string.escape_debug()
+                )
             }
             // flake8-blind-except
             CheckKind::BlindExcept(name) => format!("Do not catch blind exception: `{name}`"),
@@ -3036,6 +3130,7 @@ impl CheckKind {
             self,
             CheckKind::AmbiguousUnicodeCharacterString(..)
                 | CheckKind::AmbiguousUnicodeCharacterDocstring(..)
+                | CheckKind::AmbiguousUnicodeCharacterComment(..)
                 | CheckKind::BlankLineAfterLastSection(..)
                 | CheckKind::BlankLineAfterSection(..)
                 | CheckKind::BlankLineAfterSummary
@@ -3048,7 +3143,7 @@ impl CheckKind {
                 | CheckKind::DatetimeTimezoneUTC
                 | CheckKind::DeprecatedUnittestAlias(..)
                 | CheckKind::DoNotAssertFalse
-                | CheckKind::DoNotAssignLambda
+                | CheckKind::DoNotAssignLambda(..)
                 | CheckKind::DuplicateHandlerException(..)
                 | CheckKind::EndsInPeriod
                 | CheckKind::EndsInPunctuation
@@ -3056,16 +3151,17 @@ impl CheckKind {
                 | CheckKind::ImplicitReturn
                 | CheckKind::ImplicitReturnValue
                 | CheckKind::InvalidEscapeSequence(..)
-                | CheckKind::IsLiteral
+                | CheckKind::IsLiteral(..)
                 | CheckKind::KeyInDict(..)
                 | CheckKind::MisplacedComparisonConstant(..)
                 | CheckKind::MissingReturnTypeSpecialMethod(..)
-                | CheckKind::NativeLiterals
+                | CheckKind::NativeLiterals(..)
                 | CheckKind::OpenAlias
                 | CheckKind::NewLineAfterLastParagraph
                 | CheckKind::ReplaceUniversalNewlines
                 | CheckKind::ReplaceStdoutStderr
                 | CheckKind::RewriteCElementTree
+                | CheckKind::RewriteUnicodeLiteral
                 | CheckKind::NewLineAfterSectionName(..)
                 | CheckKind::NoBlankLineAfterFunction(..)
                 | CheckKind::NoBlankLineBeforeClass(..)
@@ -3082,10 +3178,10 @@ impl CheckKind {
                 | CheckKind::OneBlankLineBeforeClass(..)
                 | CheckKind::PEP3120UnnecessaryCodingComment
                 | CheckKind::PPrintFound
-                | CheckKind::PercentFormatExtraNamedArguments(..)
                 | CheckKind::PrintFound
+                | CheckKind::PercentFormatExtraNamedArguments(..)
                 | CheckKind::RaiseNotImplemented
-                | CheckKind::RedundantOpenModes
+                | CheckKind::RedundantOpenModes(..)
                 | CheckKind::RedundantTupleInExceptionHandler(..)
                 | CheckKind::RemoveSixCompat
                 | CheckKind::SectionNameEndsInColon(..)
@@ -3117,7 +3213,7 @@ impl CheckKind {
                 | CheckKind::UnnecessaryLiteralWithinTupleCall(..)
                 | CheckKind::UnnecessaryReturnNone
                 | CheckKind::UnsortedImports
-                | CheckKind::UnusedImport(_, false)
+                | CheckKind::UnusedImport(_, false, _)
                 | CheckKind::UnusedLoopControlVariable(..)
                 | CheckKind::UnusedNOQA(..)
                 | CheckKind::UsePEP585Annotation(..)
@@ -3128,6 +3224,235 @@ impl CheckKind {
                 | CheckKind::UselessObjectInheritance(..)
         )
     }
+
+    /// The message used to describe the fix action for a given `CheckKind`.
+    pub fn commit(&self) -> Option<String> {
+        match self {
+            CheckKind::AmbiguousUnicodeCharacterString(confusable, representant)
+            | CheckKind::AmbiguousUnicodeCharacterDocstring(confusable, representant)
+            | CheckKind::AmbiguousUnicodeCharacterComment(confusable, representant) => {
+                Some(format!("Replace '{confusable}' with '{representant}'"))
+            }
+            CheckKind::BlankLineAfterLastSection(name) => {
+                Some(format!("Add blank line after \"{name}\""))
+            }
+            CheckKind::BlankLineAfterSection(name) => {
+                Some(format!("Add blank line after \"{name}\""))
+            }
+            CheckKind::BlankLineAfterSummary => Some("Insert single blank line".to_string()),
+            CheckKind::BlankLineBeforeSection(name) => {
+                Some(format!("Add blank line before \"{name}\""))
+            }
+            CheckKind::CapitalizeSectionName(name) => Some(format!("Capitalize \"{name}\"")),
+            CheckKind::CommentedOutCode => Some("Remove commented-out code".to_string()),
+            CheckKind::ConvertTypedDictFunctionalToClass(name)
+            | CheckKind::ConvertNamedTupleFunctionalToClass(name) => {
+                Some(format!("Convert `{name}` to class syntax"))
+            }
+            CheckKind::DashedUnderlineAfterSection(name) => {
+                Some(format!("Add dashed line under \"{name}\""))
+            }
+            CheckKind::DatetimeTimezoneUTC => Some("Convert to `datetime.UTC` alias".to_string()),
+            CheckKind::DeprecatedUnittestAlias(alias, target) => {
+                Some(format!("Replace `{target}` with `{alias}`"))
+            }
+            CheckKind::DoNotAssertFalse => Some("Replace `assert False`".to_string()),
+            CheckKind::DoNotAssignLambda(name) => Some(format!("Rewrite `{name}` as a `def`")),
+            CheckKind::DuplicateHandlerException(..) => Some("De-duplicate exceptions".to_string()),
+            CheckKind::EndsInPeriod => Some("Add period".to_string()),
+            CheckKind::EndsInPunctuation => Some("Add closing punctuation".to_string()),
+            CheckKind::GetAttrWithConstant => {
+                Some("Replace `getattr` with attribute access".to_string())
+            }
+            CheckKind::ImplicitReturnValue => Some("Add explicit `None` return value".to_string()),
+            CheckKind::ImplicitReturn => Some("Add explicit `return` statement".to_string()),
+            CheckKind::InvalidEscapeSequence(..) => {
+                Some("Add backslash to escape sequence".to_string())
+            }
+            CheckKind::IsLiteral(cmpop) => Some(match cmpop {
+                IsCmpop::Is => "Replace `is` with `==`".to_string(),
+                IsCmpop::IsNot => "Replace `is not` with `!=`".to_string(),
+            }),
+            CheckKind::KeyInDict(key, dict) => Some(format!("Convert to `{key} in {dict}`")),
+            CheckKind::MisplacedComparisonConstant(comparison) => {
+                Some(format!("Replace with {comparison}"))
+            }
+            CheckKind::MissingReturnTypeSpecialMethod(..) => {
+                Some("Add `None` return type".to_string())
+            }
+            CheckKind::NativeLiterals(literal_type) => {
+                Some(format!("Replace with `{literal_type}`"))
+            }
+            CheckKind::OpenAlias => Some("Replace with builtin `open`".to_string()),
+            CheckKind::NewLineAfterLastParagraph => {
+                Some("Move closing quotes to new line".to_string())
+            }
+            CheckKind::ReplaceUniversalNewlines => {
+                Some("Replace with `text` keyword argument".to_string())
+            }
+            CheckKind::ReplaceStdoutStderr => {
+                Some("Replace with `capture_output` keyword argument".to_string())
+            }
+            CheckKind::RewriteCElementTree => Some("Replace with `ElementTree`".to_string()),
+            CheckKind::RewriteUnicodeLiteral => Some("Remove unicode prefix".to_string()),
+            CheckKind::NewLineAfterSectionName(name) => {
+                Some(format!("Add newline after \"{name}\""))
+            }
+            CheckKind::NoBlankLineBeforeFunction(..) => {
+                Some("Remove blank line(s) before function docstring".to_string())
+            }
+            CheckKind::NoBlankLineAfterFunction(..) => {
+                Some("Remove blank line(s) after function docstring".to_string())
+            }
+            CheckKind::NoBlankLineBeforeClass(..) => {
+                Some("Remove blank line(s) before class docstring".to_string())
+            }
+            CheckKind::OneBlankLineBeforeClass(..) => {
+                Some("Insert 1 blank line before class docstring".to_string())
+            }
+            CheckKind::OneBlankLineAfterClass(..) => {
+                Some("Insert 1 blank line after class docstring".to_string())
+            }
+            CheckKind::NoBlankLinesBetweenHeaderAndContent(..) => {
+                Some("Remove blank line(s)".to_string())
+            }
+            CheckKind::NoNewLineAtEndOfFile => Some("Add trailing newline".to_string()),
+            CheckKind::NoOverIndentation => Some("Remove over-indentation".to_string()),
+            CheckKind::NoSurroundingWhitespace => Some("Trim surrounding whitespace".to_string()),
+            CheckKind::NoUnderIndentation => Some("Increase indentation".to_string()),
+            CheckKind::NoneComparison(op) => Some(match op {
+                EqCmpop::Eq => "Replace with `cond is None`".to_string(),
+                EqCmpop::NotEq => "Replace with `cond is not None`".to_string(),
+            }),
+            CheckKind::NotInTest => Some("Convert to `not in`".to_string()),
+            CheckKind::NotIsTest => Some("Convert to `is not`".to_string()),
+            CheckKind::PEP3120UnnecessaryCodingComment => {
+                Some("Remove unnecessary coding comment".to_string())
+            }
+            CheckKind::PPrintFound => Some("Remove `pprint`".to_string()),
+            CheckKind::PercentFormatExtraNamedArguments(missing)
+            | CheckKind::StringDotFormatExtraNamedArguments(missing) => {
+                let message = missing.join(", ");
+                Some(format!("Remove extra named arguments: {message}"))
+            }
+            CheckKind::PrintFound => Some("Remove `print`".to_string()),
+            CheckKind::RaiseNotImplemented => Some("Use `raise NotImplementedError`".to_string()),
+            CheckKind::RedundantOpenModes(replacement) => Some(match replacement {
+                None => "Remove open mode parameters".to_string(),
+                Some(replacement) => {
+                    format!("Replace with \"{replacement}\"")
+                }
+            }),
+            CheckKind::RedundantTupleInExceptionHandler(name) => {
+                Some(format!("Replace with `except {name}`"))
+            }
+            CheckKind::RemoveSixCompat => Some("Remove `six` usage".to_string()),
+            CheckKind::SectionNameEndsInColon(name) => Some(format!("Add colon to \"{name}\"")),
+            CheckKind::SectionNotOverIndented(name) => {
+                Some(format!("Remove over-indentation from \"{name}\""))
+            }
+            CheckKind::SectionUnderlineAfterName(name) => {
+                Some(format!("Add underline to \"{name}\""))
+            }
+            CheckKind::SectionUnderlineMatchesSectionLength(name) => {
+                Some(format!("Adjust underline length to match \"{name}\""))
+            }
+            CheckKind::SectionUnderlineNotOverIndented(name) => {
+                Some(format!("Remove over-indentation from \"{name}\" underline"))
+            }
+            CheckKind::SetAttrWithConstant => Some("Replace `setattr` with assignment".to_string()),
+            CheckKind::SuperCallWithParameters => Some("Remove `__super__` parameters".to_string()),
+            CheckKind::TrueFalseComparison(true, EqCmpop::Eq) => {
+                Some("Replace with `cond is True`".to_string())
+            }
+            CheckKind::TrueFalseComparison(true, EqCmpop::NotEq) => {
+                Some("Replace with `cond is not True`".to_string())
+            }
+            CheckKind::TrueFalseComparison(false, EqCmpop::Eq) => {
+                Some("Replace with `cond is False`".to_string())
+            }
+            CheckKind::TrueFalseComparison(false, EqCmpop::NotEq) => {
+                Some("Replace with `cond is not False`".to_string())
+            }
+            CheckKind::TypeOfPrimitive(primitive) => Some(format!(
+                "Replace `type(...)` with `{}`",
+                primitive.builtin()
+            )),
+            CheckKind::TypingTextStrAlias => Some("Replace with `str`".to_string()),
+            CheckKind::UnnecessaryCallAroundSorted(func) => {
+                Some(format!("Remove unnecessary `{func}` call"))
+            }
+            CheckKind::UnnecessaryCollectionCall(..) => Some("Rewrite as a literal".to_string()),
+            CheckKind::UnnecessaryComprehension(obj_type) => {
+                Some(format!("Rewrite using `{obj_type}()`"))
+            }
+            CheckKind::UnnecessaryEncodeUTF8 => Some("Remove unnecessary `encode`".to_string()),
+            CheckKind::UnnecessaryFutureImport(..) => {
+                Some("Remove unnecessary `__future__` import".to_string())
+            }
+            CheckKind::UnnecessaryGeneratorDict => {
+                Some("Rewrite as a `dict` comprehension".to_string())
+            }
+            CheckKind::UnnecessaryGeneratorList => {
+                Some("Rewrite as a `list` comprehension".to_string())
+            }
+            CheckKind::UnnecessaryGeneratorSet => {
+                Some("Rewrite as a `set` comprehension".to_string())
+            }
+            CheckKind::UnnecessaryLRUCacheParams => {
+                Some("Remove unnecessary parameters".to_string())
+            }
+            CheckKind::UnnecessaryListCall => Some("Remove outer `list` call".to_string()),
+            CheckKind::UnnecessaryListComprehensionDict => {
+                Some("Rewrite as a `dict` comprehension".to_string())
+            }
+            CheckKind::UnnecessaryListComprehensionSet => {
+                Some("Rewrite as a `set` comprehension".to_string())
+            }
+            CheckKind::UnnecessaryLiteralDict(..) => {
+                Some("Rewrite as a `dict` literal".to_string())
+            }
+            CheckKind::UnnecessaryLiteralSet(..) => Some("Rewrite as a `set` literal".to_string()),
+            CheckKind::UnnecessaryLiteralWithinTupleCall(literal) => Some({
+                if literal == "list" {
+                    "Rewrite as a `tuple` literal".to_string()
+                } else {
+                    "Remove outer `tuple` call".to_string()
+                }
+            }),
+            CheckKind::UnnecessaryLiteralWithinListCall(literal) => Some({
+                if literal == "list" {
+                    "Remove outer `list` call".to_string()
+                } else {
+                    "Rewrite as a `list` literal".to_string()
+                }
+            }),
+            CheckKind::UnnecessaryReturnNone => Some("Remove explicit `return None`".to_string()),
+            CheckKind::UnsortedImports => Some("Organize imports".to_string()),
+            CheckKind::UnusedImport(name, false, multiple) => {
+                if *multiple {
+                    Some("Remove unused import".to_string())
+                } else {
+                    Some(format!("Remove unused import: `{name}`"))
+                }
+            }
+            CheckKind::UnusedLoopControlVariable(name) => {
+                Some(format!("Rename unused `{name}` to `_{name}`"))
+            }
+            CheckKind::UnusedNOQA(..) => Some("Remove unused `noqa` directive".to_string()),
+            CheckKind::UsePEP585Annotation(name) => {
+                Some(format!("Replace `{name}` with `{}`", name.to_lowercase(),))
+            }
+            CheckKind::UsePEP604Annotation => Some("Convert to `X | Y`".to_string()),
+            CheckKind::UseSysExit(name) => Some(format!("Replace `{name}` with `sys.exit()`")),
+            CheckKind::UselessImportAlias => Some("Remove import alias".to_string()),
+            CheckKind::UselessMetaclassType => Some("Remove `__metaclass__ = type`".to_string()),
+            CheckKind::UselessObjectInheritance(..) => {
+                Some("Remove `object` inheritance".to_string())
+            }
+            _ => None,
+        }
+    }
 }
 
 #[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
@@ -3136,6 +3461,7 @@ pub struct Check {
     pub location: Location,
     pub end_location: Location,
     pub fix: Option<Fix>,
+    pub parent: Option<Location>,
 }
 
 impl Check {
@@ -3145,11 +3471,18 @@ impl Check {
             location: range.location,
             end_location: range.end_location,
             fix: None,
+            parent: None,
         }
     }
 
-    pub fn amend(&mut self, fix: Fix) {
+    pub fn amend(&mut self, fix: Fix) -> &mut Self {
         self.fix = Some(fix);
+        self
+    }
+
+    pub fn parent(&mut self, parent: Location) -> &mut Self {
+        self.parent = Some(parent);
+        self
     }
 }
 
@@ -3300,4 +3633,17 @@ mod tests {
             );
         }
     }
+
+    #[test]
+    fn fixable_codes() {
+        for check_code in CheckCode::iter() {
+            let kind = check_code.kind();
+            if kind.fixable() {
+                assert!(
+                    kind.commit().is_some(),
+                    "{check_code:?} is fixable but has no commit message."
+                );
+            }
+        }
+    }
 }

src/checks_gen.rs

@@ -283,8 +283,6 @@ pub enum CheckCodePrefix {
     F821,
     F822,
     F823,
-    F83,
-    F831,
     F84,
     F841,
     F842,
@@ -314,6 +312,12 @@ pub enum CheckCodePrefix {
     ICN0,
     ICN00,
     ICN001,
+    ISC,
+    ISC0,
+    ISC00,
+    ISC001,
+    ISC002,
+    ISC003,
     M,
     M0,
     M001,
@@ -486,6 +490,7 @@ pub enum CheckCodePrefix {
     TID,
     TID2,
     TID25,
+    TID251,
     TID252,
     U,
     U0,
@@ -535,6 +540,7 @@ pub enum CheckCodePrefix {
     UP021,
     UP022,
     UP023,
+    UP025,
     W,
     W2,
     W29,
@@ -639,7 +645,6 @@ impl CheckCodePrefix {
                 CheckCode::F821,
                 CheckCode::F822,
                 CheckCode::F823,
-                CheckCode::F831,
                 CheckCode::F841,
                 CheckCode::F842,
                 CheckCode::F901,
@@ -705,6 +710,7 @@ impl CheckCodePrefix {
                 CheckCode::C417,
                 CheckCode::T100,
                 CheckCode::C901,
+                CheckCode::TID251,
                 CheckCode::TID252,
                 CheckCode::RET501,
                 CheckCode::RET502,
@@ -714,6 +720,9 @@ impl CheckCodePrefix {
                 CheckCode::RET506,
                 CheckCode::RET507,
                 CheckCode::RET508,
+                CheckCode::ISC001,
+                CheckCode::ISC002,
+                CheckCode::ISC003,
                 CheckCode::T201,
                 CheckCode::T203,
                 CheckCode::Q000,
@@ -764,6 +773,7 @@ impl CheckCodePrefix {
                 CheckCode::UP021,
                 CheckCode::UP022,
                 CheckCode::UP023,
+                CheckCode::UP025,
                 CheckCode::D100,
                 CheckCode::D101,
                 CheckCode::D102,
@@ -1493,7 +1503,6 @@ impl CheckCodePrefix {
                 CheckCode::F821,
                 CheckCode::F822,
                 CheckCode::F823,
-                CheckCode::F831,
                 CheckCode::F841,
                 CheckCode::F842,
                 CheckCode::F901,
@@ -1627,7 +1636,6 @@ impl CheckCodePrefix {
                 CheckCode::F821,
                 CheckCode::F822,
                 CheckCode::F823,
-                CheckCode::F831,
                 CheckCode::F841,
                 CheckCode::F842,
             ],
@@ -1637,8 +1645,6 @@ impl CheckCodePrefix {
             CheckCodePrefix::F821 => vec![CheckCode::F821],
             CheckCodePrefix::F822 => vec![CheckCode::F822],
             CheckCodePrefix::F823 => vec![CheckCode::F823],
-            CheckCodePrefix::F83 => vec![CheckCode::F831],
-            CheckCodePrefix::F831 => vec![CheckCode::F831],
             CheckCodePrefix::F84 => vec![CheckCode::F841, CheckCode::F842],
             CheckCodePrefix::F841 => vec![CheckCode::F841],
             CheckCodePrefix::F842 => vec![CheckCode::F842],
@@ -1662,7 +1668,7 @@ impl CheckCodePrefix {
                     ":".bold(),
                     "`I2` has been remapped to `TID2`".bold()
                 );
-                vec![CheckCode::TID252]
+                vec![CheckCode::TID251, CheckCode::TID252]
             }
             CheckCodePrefix::I25 => {
                 one_time_warning!(
@@ -1671,7 +1677,7 @@ impl CheckCodePrefix {
                     ":".bold(),
                     "`I25` has been remapped to `TID25`".bold()
                 );
-                vec![CheckCode::TID252]
+                vec![CheckCode::TID251, CheckCode::TID252]
             }
             CheckCodePrefix::I252 => {
                 one_time_warning!(
@@ -1740,6 +1746,12 @@ impl CheckCodePrefix {
             CheckCodePrefix::ICN0 => vec![CheckCode::ICN001],
             CheckCodePrefix::ICN00 => vec![CheckCode::ICN001],
             CheckCodePrefix::ICN001 => vec![CheckCode::ICN001],
+            CheckCodePrefix::ISC => vec![CheckCode::ISC001, CheckCode::ISC002, CheckCode::ISC003],
+            CheckCodePrefix::ISC0 => vec![CheckCode::ISC001, CheckCode::ISC002, CheckCode::ISC003],
+            CheckCodePrefix::ISC00 => vec![CheckCode::ISC001, CheckCode::ISC002, CheckCode::ISC003],
+            CheckCodePrefix::ISC001 => vec![CheckCode::ISC001],
+            CheckCodePrefix::ISC002 => vec![CheckCode::ISC002],
+            CheckCodePrefix::ISC003 => vec![CheckCode::ISC003],
             CheckCodePrefix::M => {
                 one_time_warning!(
                     "{}{} {}",
@@ -2405,9 +2417,10 @@ impl CheckCodePrefix {
             CheckCodePrefix::T20 => vec![CheckCode::T201, CheckCode::T203],
             CheckCodePrefix::T201 => vec![CheckCode::T201],
             CheckCodePrefix::T203 => vec![CheckCode::T203],
-            CheckCodePrefix::TID => vec![CheckCode::TID252],
-            CheckCodePrefix::TID2 => vec![CheckCode::TID252],
-            CheckCodePrefix::TID25 => vec![CheckCode::TID252],
+            CheckCodePrefix::TID => vec![CheckCode::TID251, CheckCode::TID252],
+            CheckCodePrefix::TID2 => vec![CheckCode::TID251, CheckCode::TID252],
+            CheckCodePrefix::TID25 => vec![CheckCode::TID251, CheckCode::TID252],
+            CheckCodePrefix::TID251 => vec![CheckCode::TID251],
             CheckCodePrefix::TID252 => vec![CheckCode::TID252],
             CheckCodePrefix::U => {
                 one_time_warning!(
@@ -2439,6 +2452,7 @@ impl CheckCodePrefix {
                     CheckCode::UP021,
                     CheckCode::UP022,
                     CheckCode::UP023,
+                    CheckCode::UP025,
                 ]
             }
             CheckCodePrefix::U0 => {
@@ -2471,6 +2485,7 @@ impl CheckCodePrefix {
                     CheckCode::UP021,
                     CheckCode::UP022,
                     CheckCode::UP023,
+                    CheckCode::UP025,
                 ]
             }
             CheckCodePrefix::U00 => {
@@ -2687,6 +2702,7 @@ impl CheckCodePrefix {
                 CheckCode::UP021,
                 CheckCode::UP022,
                 CheckCode::UP023,
+                CheckCode::UP025,
             ],
             CheckCodePrefix::UP0 => vec![
                 CheckCode::UP001,
@@ -2711,6 +2727,7 @@ impl CheckCodePrefix {
                 CheckCode::UP021,
                 CheckCode::UP022,
                 CheckCode::UP023,
+                CheckCode::UP025,
             ],
             CheckCodePrefix::UP00 => vec![
                 CheckCode::UP001,
@@ -2757,11 +2774,13 @@ impl CheckCodePrefix {
                 CheckCode::UP021,
                 CheckCode::UP022,
                 CheckCode::UP023,
+                CheckCode::UP025,
             ],
             CheckCodePrefix::UP020 => vec![CheckCode::UP020],
             CheckCodePrefix::UP021 => vec![CheckCode::UP021],
             CheckCodePrefix::UP022 => vec![CheckCode::UP022],
             CheckCodePrefix::UP023 => vec![CheckCode::UP023],
+            CheckCodePrefix::UP025 => vec![CheckCode::UP025],
             CheckCodePrefix::W => vec![CheckCode::W292, CheckCode::W605],
             CheckCodePrefix::W2 => vec![CheckCode::W292],
             CheckCodePrefix::W29 => vec![CheckCode::W292],
@@ -3076,8 +3095,6 @@ impl CheckCodePrefix {
             CheckCodePrefix::F821 => SuffixLength::Three,
             CheckCodePrefix::F822 => SuffixLength::Three,
             CheckCodePrefix::F823 => SuffixLength::Three,
-            CheckCodePrefix::F83 => SuffixLength::Two,
-            CheckCodePrefix::F831 => SuffixLength::Three,
             CheckCodePrefix::F84 => SuffixLength::Two,
             CheckCodePrefix::F841 => SuffixLength::Three,
             CheckCodePrefix::F842 => SuffixLength::Three,
@@ -3107,6 +3124,12 @@ impl CheckCodePrefix {
             CheckCodePrefix::ICN0 => SuffixLength::One,
             CheckCodePrefix::ICN00 => SuffixLength::Two,
             CheckCodePrefix::ICN001 => SuffixLength::Three,
+            CheckCodePrefix::ISC => SuffixLength::Zero,
+            CheckCodePrefix::ISC0 => SuffixLength::One,
+            CheckCodePrefix::ISC00 => SuffixLength::Two,
+            CheckCodePrefix::ISC001 => SuffixLength::Three,
+            CheckCodePrefix::ISC002 => SuffixLength::Three,
+            CheckCodePrefix::ISC003 => SuffixLength::Three,
             CheckCodePrefix::M => SuffixLength::Zero,
             CheckCodePrefix::M0 => SuffixLength::One,
             CheckCodePrefix::M001 => SuffixLength::Three,
@@ -3279,6 +3302,7 @@ impl CheckCodePrefix {
             CheckCodePrefix::TID => SuffixLength::Zero,
             CheckCodePrefix::TID2 => SuffixLength::One,
             CheckCodePrefix::TID25 => SuffixLength::Two,
+            CheckCodePrefix::TID251 => SuffixLength::Three,
             CheckCodePrefix::TID252 => SuffixLength::Three,
             CheckCodePrefix::U => SuffixLength::Zero,
             CheckCodePrefix::U0 => SuffixLength::One,
@@ -3328,6 +3352,7 @@ impl CheckCodePrefix {
             CheckCodePrefix::UP021 => SuffixLength::Three,
             CheckCodePrefix::UP022 => SuffixLength::Three,
             CheckCodePrefix::UP023 => SuffixLength::Three,
+            CheckCodePrefix::UP025 => SuffixLength::Three,
             CheckCodePrefix::W => SuffixLength::Zero,
             CheckCodePrefix::W2 => SuffixLength::One,
             CheckCodePrefix::W29 => SuffixLength::Two,
@@ -3373,6 +3398,7 @@ pub const CATEGORIES: &[CheckCodePrefix] = &[
     CheckCodePrefix::FBT,
     CheckCodePrefix::I,
     CheckCodePrefix::ICN,
+    CheckCodePrefix::ISC,
     CheckCodePrefix::N,
     CheckCodePrefix::PD,
     CheckCodePrefix::PGH,

src/cli.rs

@@ -17,7 +17,7 @@ use crate::settings::types::{
 #[command(version)]
 #[allow(clippy::struct_excessive_bools)]
 pub struct Cli {
-    #[arg(required_unless_present_any = ["explain", "generate_shell_completion"])]
+    #[arg(required_unless_present_any = ["clean", "explain", "generate_shell_completion"])]
     pub files: Vec<PathBuf>,
     /// Path to the `pyproject.toml` or `ruff.toml` file to use for
     /// configuration.
@@ -57,14 +57,15 @@ pub struct Cli {
     /// Disable cache reads.
     #[arg(short, long)]
     pub no_cache: bool,
-    /// List of error codes to enable.
+    /// Comma-separated list of error codes to enable (or ALL, to enable all
+    /// checks).
     #[arg(long, value_delimiter = ',')]
     pub select: Option<Vec<CheckCodePrefix>>,
     /// Like --select, but adds additional error codes on top of the selected
     /// ones.
     #[arg(long, value_delimiter = ',')]
     pub extend_select: Option<Vec<CheckCodePrefix>>,
-    /// List of error codes to ignore.
+    /// Comma-separated list of error codes to disable.
     #[arg(long, value_delimiter = ',')]
     pub ignore: Option<Vec<CheckCodePrefix>>,
     /// Like --ignore, but adds additional error codes on top of the ignored
@@ -92,6 +93,12 @@ pub struct Cli {
     /// Output serialization format for error messages.
     #[arg(long, value_enum)]
     pub format: Option<SerializationFormat>,
+    /// The name of the file when passing it through stdin.
+    #[arg(long)]
+    pub stdin_filename: Option<PathBuf>,
+    /// Path to the cache directory.
+    #[arg(long)]
+    pub cache_dir: Option<PathBuf>,
     /// Show violations with source code.
     #[arg(long, overrides_with("no_show_source"))]
     show_source: bool,
@@ -114,15 +121,6 @@ pub struct Cli {
     update_check: bool,
     #[clap(long, overrides_with("update_check"), hide = true)]
     no_update_check: bool,
-    /// See the files Ruff will be run against with the current settings.
-    #[arg(long)]
-    pub show_files: bool,
-    /// See the settings Ruff will use to check a given Python file.
-    #[arg(long)]
-    pub show_settings: bool,
-    /// Enable automatic additions of noqa directives to failing lines.
-    #[arg(long)]
-    pub add_noqa: bool,
     /// Regular expression matching the name of dummy variables.
     #[arg(long)]
     pub dummy_variable_rgx: Option<Regex>,
@@ -133,25 +131,100 @@ pub struct Cli {
     /// formatting.
     #[arg(long)]
     pub line_length: Option<usize>,
-    /// Max McCabe complexity allowed for a function.
+    /// Maximum McCabe complexity allowed for a given function.
     #[arg(long)]
     pub max_complexity: Option<usize>,
-    /// Round-trip auto-formatting.
-    // TODO(charlie): This should be a sub-command.
-    #[arg(long, hide = true)]
-    pub autoformat: bool,
-    /// The name of the file when passing it through stdin.
-    #[arg(long)]
-    pub stdin_filename: Option<PathBuf>,
+    /// Enable automatic additions of `noqa` directives to failing lines.
+    #[arg(
+        long,
+        // conflicts_with = "add_noqa",
+        conflicts_with = "clean",
+        conflicts_with = "explain",
+        conflicts_with = "generate_shell_completion",
+        conflicts_with = "show_files",
+        conflicts_with = "show_settings",
+        // Unsupported default-command arguments.
+        conflicts_with = "stdin_filename",
+        conflicts_with = "watch",
+    )]
+    pub add_noqa: bool,
+    /// Clear any caches in the current directory or any subdirectories.
+    #[arg(
+        long,
+        // Fake subcommands.
+        conflicts_with = "add_noqa",
+        // conflicts_with = "clean",
+        conflicts_with = "explain",
+        conflicts_with = "generate_shell_completion",
+        conflicts_with = "show_files",
+        conflicts_with = "show_settings",
+        // Unsupported default-command arguments.
+        conflicts_with = "stdin_filename",
+        conflicts_with = "watch",
+    )]
+    pub clean: bool,
     /// Explain a rule.
-    #[arg(long)]
+    #[arg(
+        long,
+        // Fake subcommands.
+        conflicts_with = "add_noqa",
+        conflicts_with = "clean",
+        // conflicts_with = "explain",
+        conflicts_with = "generate_shell_completion",
+        conflicts_with = "show_files",
+        conflicts_with = "show_settings",
+        // Unsupported default-command arguments.
+        conflicts_with = "stdin_filename",
+        conflicts_with = "watch",
+    )]
     pub explain: Option<CheckCode>,
     /// Generate shell completion
-    #[arg(long, hide = true, value_name = "SHELL")]
+    #[arg(
+        long,
+        hide = true,
+        value_name = "SHELL",
+        // Fake subcommands.
+        conflicts_with = "add_noqa",
+        conflicts_with = "clean",
+        conflicts_with = "explain",
+        // conflicts_with = "generate_shell_completion",
+        conflicts_with = "show_files",
+        conflicts_with = "show_settings",
+        // Unsupported default-command arguments.
+        conflicts_with = "stdin_filename",
+        conflicts_with = "watch",
+    )]
     pub generate_shell_completion: Option<clap_complete_command::Shell>,
-    /// Path to the cache directory.
-    #[arg(long)]
-    pub cache_dir: Option<PathBuf>,
+    /// See the files Ruff will be run against with the current settings.
+    #[arg(
+        long,
+        // Fake subcommands.
+        conflicts_with = "add_noqa",
+        conflicts_with = "clean",
+        conflicts_with = "explain",
+        conflicts_with = "generate_shell_completion",
+        // conflicts_with = "show_files",
+        conflicts_with = "show_settings",
+        // Unsupported default-command arguments.
+        conflicts_with = "stdin_filename",
+        conflicts_with = "watch",
+    )]
+    pub show_files: bool,
+    /// See the settings Ruff will use to check a given Python file.
+    #[arg(
+        long,
+        // Fake subcommands.
+        conflicts_with = "add_noqa",
+        conflicts_with = "clean",
+        conflicts_with = "explain",
+        conflicts_with = "generate_shell_completion",
+        conflicts_with = "show_files",
+        // conflicts_with = "show_settings",
+        // Unsupported default-command arguments.
+        conflicts_with = "stdin_filename",
+        conflicts_with = "watch",
+    )]
+    pub show_settings: bool,
 }
 
 impl Cli {
@@ -161,7 +234,7 @@ impl Cli {
         (
             Arguments {
                 add_noqa: self.add_noqa,
-                autoformat: self.autoformat,
+                clean: self.clean,
                 config: self.config,
                 diff: self.diff,
                 exit_zero: self.exit_zero,
@@ -222,7 +295,7 @@ fn resolve_bool_arg(yes: bool, no: bool) -> Option<bool> {
 #[allow(clippy::struct_excessive_bools)]
 pub struct Arguments {
     pub add_noqa: bool,
-    pub autoformat: bool,
+    pub clean: bool,
     pub config: Option<PathBuf>,
     pub diff: bool,
     pub exit_zero: bool,

src/commands.rs

@@ -1,26 +1,32 @@
+use std::fs::remove_dir_all;
 use std::io::{self, Read};
 use std::path::{Path, PathBuf};
 use std::time::Instant;
 
 use anyhow::{bail, Result};
+use colored::Colorize;
 use ignore::Error;
 use itertools::Itertools;
 use log::{debug, error};
+use path_absolutize::path_dedot;
 #[cfg(not(target_family = "wasm"))]
 use rayon::prelude::*;
 use rustpython_ast::Location;
 use serde::Serialize;
+use walkdir::WalkDir;
 
 use crate::autofix::fixer;
+use crate::cache::DEFAULT_CACHE_DIR_NAME;
 use crate::checks::{CheckCode, CheckKind};
 use crate::cli::Overrides;
 use crate::iterators::par_iter;
-use crate::linter::{add_noqa_to_path, autoformat_path, lint_path, lint_stdin, Diagnostics};
+use crate::linter::{add_noqa_to_path, lint_path, lint_stdin, Diagnostics};
+use crate::logging::LogLevel;
 use crate::message::Message;
 use crate::resolver::{FileDiscovery, PyprojectDiscovery};
 use crate::settings::flags;
 use crate::settings::types::SerializationFormat;
-use crate::{cache, packages, resolver};
+use crate::{cache, fs, one_time_warning, packages, resolver};
 
 /// Run the linter over a collection of files.
 pub fn run(
@@ -38,6 +44,15 @@ pub fn run(
     let duration = start.elapsed();
     debug!("Identified files to lint in: {:?}", duration);
 
+    if paths.is_empty() {
+        one_time_warning!(
+            "{} {}",
+            "warning:".yellow().bold(),
+            "No Python files found under the given path(s)"
+        );
+        return Ok(Diagnostics::default());
+    }
+
     // Validate the `Settings` and return any errors.
     resolver.validate(pyproject_strategy)?;
 
@@ -179,6 +194,15 @@ pub fn add_noqa(
     let duration = start.elapsed();
     debug!("Identified files to lint in: {:?}", duration);
 
+    if paths.is_empty() {
+        one_time_warning!(
+            "{} {}",
+            "warning:".yellow().bold(),
+            "No Python files found under the given path(s)"
+        );
+        return Ok(0);
+    }
+
     // Validate the `Settings` and return any errors.
     resolver.validate(pyproject_strategy)?;
 
@@ -204,45 +228,6 @@ pub fn add_noqa(
     Ok(modifications)
 }
 
-/// Automatically format a collection of files.
-pub fn autoformat(
-    files: &[PathBuf],
-    pyproject_strategy: &PyprojectDiscovery,
-    file_strategy: &FileDiscovery,
-    overrides: &Overrides,
-) -> Result<usize> {
-    // Collect all the files to format.
-    let start = Instant::now();
-    let (paths, resolver) =
-        resolver::python_files_in_path(files, pyproject_strategy, file_strategy, overrides)?;
-    let duration = start.elapsed();
-    debug!("Identified files to lint in: {:?}", duration);
-
-    // Validate the `Settings` and return any errors.
-    resolver.validate(pyproject_strategy)?;
-
-    let start = Instant::now();
-    let modifications = par_iter(&paths)
-        .flatten()
-        .filter_map(|entry| {
-            let path = entry.path();
-            let settings = resolver.resolve(path, pyproject_strategy);
-            match autoformat_path(path, settings) {
-                Ok(()) => Some(()),
-                Err(e) => {
-                    error!("Failed to autoformat {}: {e}", path.to_string_lossy());
-                    None
-                }
-            }
-        })
-        .count();
-
-    let duration = start.elapsed();
-    debug!("Auto-formatted files in: {:?}", duration);
-
-    Ok(modifications)
-}
-
 /// Print the user-facing configuration settings.
 pub fn show_settings(
     files: &[PathBuf],
@@ -283,6 +268,15 @@ pub fn show_files(
     let (paths, resolver) =
         resolver::python_files_in_path(files, pyproject_strategy, file_strategy, overrides)?;
 
+    if paths.is_empty() {
+        one_time_warning!(
+            "{} {}",
+            "warning:".yellow().bold(),
+            "No Python files found under the given path(s)"
+        );
+        return Ok(());
+    }
+
     // Validate the `Settings` and return any errors.
     resolver.validate(pyproject_strategy)?;
 
@@ -338,3 +332,21 @@ pub fn explain(code: &CheckCode, format: &SerializationFormat) -> Result<()> {
     };
     Ok(())
 }
+
+/// Clear any caches in the current directory or any subdirectories.
+pub fn clean(level: &LogLevel) -> Result<()> {
+    for entry in WalkDir::new(&*path_dedot::CWD)
+        .into_iter()
+        .filter_map(std::result::Result::ok)
+        .filter(|entry| entry.file_type().is_dir())
+    {
+        let cache = entry.path().join(DEFAULT_CACHE_DIR_NAME);
+        if cache.is_dir() {
+            if level >= &LogLevel::Default {
+                eprintln!("Removing cache at: {}", fs::relativize_path(&cache).bold());
+            }
+            remove_dir_all(&cache)?;
+        }
+    }
+    Ok(())
+}

src/docstrings/constants.rs

@@ -1,9 +1,9 @@
+// See: https://docs.python.org/3/reference/lexical_analysis.html#string-and-bytes-literals.
+
 pub const TRIPLE_QUOTE_PREFIXES: &[&str] = &[
-    "ur\"\"\"", "ur'''", "u\"\"\"", "u'''", "r\"\"\"", "r'''", "UR\"\"\"", "UR'''", "Ur\"\"\"",
-    "Ur'''", "U\"\"\"", "U'''", "uR\"\"\"", "uR'''", "R\"\"\"", "R'''", "\"\"\"", "'''",
+    "u\"\"\"", "u'''", "r\"\"\"", "r'''", "U\"\"\"", "U'''", "R\"\"\"", "R'''", "\"\"\"", "'''",
 ];
 
 pub const SINGLE_QUOTE_PREFIXES: &[&str] = &[
-    "ur\"", "ur'", "u\"", "u'", "r\"", "r'", "ur\"", "ur'", "u\"", "u'", "r\"", "r'", "UR\"",
-    "UR'", "Ur\"", "Ur'", "U\"", "U'", "uR\"", "uR'", "R\"", "R'", "\"", "'",
+    "u\"", "u'", "r\"", "r'", "u\"", "u'", "r\"", "r'", "U\"", "U'", "R\"", "R'", "\"", "'",
 ];

src/eradicate/mod.rs

@@ -16,13 +16,12 @@ mod tests {
     #[test_case(CheckCode::ERA001, Path::new("ERA001.py"); "ERA001")]
     fn checks(check_code: CheckCode, path: &Path) -> Result<()> {
         let snapshot = format!("{}_{}", check_code.as_ref(), path.to_string_lossy());
-        let mut checks = test_path(
+        let checks = test_path(
             Path::new("./resources/test/fixtures/eradicate")
                 .join(path)
                 .as_path(),
             &settings::Settings::for_rule(check_code),
         )?;
-        checks.sort_by_key(|check| check.location);
         insta::assert_yaml_snapshot!(snapshot, checks);
         Ok(())
     }

src/eradicate/snapshots/ruff__eradicate__tests__ERA001_ERA001.py.snap

@@ -17,6 +17,7 @@ expression: checks
     end_location:
       row: 2
       column: 0
+  parent: ~
 - kind: CommentedOutCode
   location:
     row: 2
@@ -32,6 +33,7 @@ expression: checks
     end_location:
       row: 3
       column: 0
+  parent: ~
 - kind: CommentedOutCode
   location:
     row: 3
@@ -47,6 +49,7 @@ expression: checks
     end_location:
       row: 4
       column: 0
+  parent: ~
 - kind: CommentedOutCode
   location:
     row: 5
@@ -62,6 +65,7 @@ expression: checks
     end_location:
       row: 6
       column: 0
+  parent: ~
 - kind: CommentedOutCode
   location:
     row: 12
@@ -77,4 +81,5 @@ expression: checks
     end_location:
       row: 13
       column: 0
+  parent: ~
 

src/flake8_2020/mod.rs

@@ -24,13 +24,12 @@ mod tests {
     #[test_case(CheckCode::YTT303, Path::new("YTT303.py"); "YTT303")]
     fn checks(check_code: CheckCode, path: &Path) -> Result<()> {
         let snapshot = format!("{}_{}", check_code.as_ref(), path.to_string_lossy());
-        let mut checks = test_path(
+        let checks = test_path(
             Path::new("./resources/test/fixtures/flake8_2020")
                 .join(path)
                 .as_path(),
             &settings::Settings::for_rule(check_code),
         )?;
-        checks.sort_by_key(|check| check.location);
         insta::assert_yaml_snapshot!(snapshot, checks);
         Ok(())
     }

src/flake8_2020/snapshots/ruff__flake8_2020__tests__YTT101_YTT101.py.snap

@@ -10,6 +10,7 @@ expression: checks
     row: 6
     column: 17
   fix: ~
+  parent: ~
 - kind: SysVersionSlice3Referenced
   location:
     row: 7
@@ -18,6 +19,7 @@ expression: checks
     row: 7
     column: 13
   fix: ~
+  parent: ~
 - kind: SysVersionSlice3Referenced
   location:
     row: 8
@@ -26,4 +28,5 @@ expression: checks
     row: 8
     column: 7
   fix: ~
+  parent: ~
 

src/flake8_2020/snapshots/ruff__flake8_2020__tests__YTT102_YTT102.py.snap

@@ -10,6 +10,7 @@ expression: checks
     row: 4
     column: 22
   fix: ~
+  parent: ~
 - kind: SysVersion2Referenced
   location:
     row: 5
@@ -18,4 +19,5 @@ expression: checks
     row: 5
     column: 18
   fix: ~
+  parent: ~
 

src/flake8_2020/snapshots/ruff__flake8_2020__tests__YTT103_YTT103.py.snap

@@ -10,6 +10,7 @@ expression: checks
     row: 4
     column: 7
   fix: ~
+  parent: ~
 - kind: SysVersionCmpStr3
   location:
     row: 5
@@ -18,6 +19,7 @@ expression: checks
     row: 5
     column: 11
   fix: ~
+  parent: ~
 - kind: SysVersionCmpStr3
   location:
     row: 6
@@ -26,6 +28,7 @@ expression: checks
     row: 6
     column: 11
   fix: ~
+  parent: ~
 - kind: SysVersionCmpStr3
   location:
     row: 7
@@ -34,6 +37,7 @@ expression: checks
     row: 7
     column: 11
   fix: ~
+  parent: ~
 - kind: SysVersionCmpStr3
   location:
     row: 8
@@ -42,4 +46,5 @@ expression: checks
     row: 8
     column: 11
   fix: ~
+  parent: ~
 

src/flake8_2020/snapshots/ruff__flake8_2020__tests__YTT201_YTT201.py.snap

@@ -10,6 +10,7 @@ expression: checks
     row: 7
     column: 25
   fix: ~
+  parent: ~
 - kind: SysVersionInfo0Eq3Referenced
   location:
     row: 8
@@ -18,6 +19,7 @@ expression: checks
     row: 8
     column: 21
   fix: ~
+  parent: ~
 - kind: SysVersionInfo0Eq3Referenced
   location:
     row: 9
@@ -26,6 +28,7 @@ expression: checks
     row: 9
     column: 25
   fix: ~
+  parent: ~
 - kind: SysVersionInfo0Eq3Referenced
   location:
     row: 10
@@ -34,4 +37,5 @@ expression: checks
     row: 10
     column: 21
   fix: ~
+  parent: ~
 

src/flake8_2020/snapshots/ruff__flake8_2020__tests__YTT202_YTT202.py.snap

@@ -10,6 +10,7 @@ expression: checks
     row: 4
     column: 10
   fix: ~
+  parent: ~
 - kind: SixPY3Referenced
   location:
     row: 6
@@ -18,4 +19,5 @@ expression: checks
     row: 6
     column: 6
   fix: ~
+  parent: ~
 

src/flake8_2020/snapshots/ruff__flake8_2020__tests__YTT203_YTT203.py.snap

@@ -10,6 +10,7 @@ expression: checks
     row: 4
     column: 19
   fix: ~
+  parent: ~
 - kind: SysVersionInfo1CmpInt
   location:
     row: 5
@@ -18,4 +19,5 @@ expression: checks
     row: 5
     column: 15
   fix: ~
+  parent: ~
 

src/flake8_2020/snapshots/ruff__flake8_2020__tests__YTT204_YTT204.py.snap

@@ -10,6 +10,7 @@ expression: checks
     row: 4
     column: 22
   fix: ~
+  parent: ~
 - kind: SysVersionInfoMinorCmpInt
   location:
     row: 5
@@ -18,4 +19,5 @@ expression: checks
     row: 5
     column: 18
   fix: ~
+  parent: ~
 

src/flake8_2020/snapshots/ruff__flake8_2020__tests__YTT301_YTT301.py.snap

@@ -10,6 +10,7 @@ expression: checks
     row: 4
     column: 22
   fix: ~
+  parent: ~
 - kind: SysVersion0Referenced
   location:
     row: 5
@@ -18,4 +19,5 @@ expression: checks
     row: 5
     column: 18
   fix: ~
+  parent: ~
 

src/flake8_2020/snapshots/ruff__flake8_2020__tests__YTT302_YTT302.py.snap

@@ -10,6 +10,7 @@ expression: checks
     row: 4
     column: 7
   fix: ~
+  parent: ~
 - kind: SysVersionCmpStr10
   location:
     row: 5
@@ -18,6 +19,7 @@ expression: checks
     row: 5
     column: 11
   fix: ~
+  parent: ~
 - kind: SysVersionCmpStr10
   location:
     row: 6
@@ -26,6 +28,7 @@ expression: checks
     row: 6
     column: 11
   fix: ~
+  parent: ~
 - kind: SysVersionCmpStr10
   location:
     row: 7
@@ -34,6 +37,7 @@ expression: checks
     row: 7
     column: 11
   fix: ~
+  parent: ~
 - kind: SysVersionCmpStr10
   location:
     row: 8
@@ -42,4 +46,5 @@ expression: checks
     row: 8
     column: 11
   fix: ~
+  parent: ~
 

src/flake8_2020/snapshots/ruff__flake8_2020__tests__YTT303_YTT303.py.snap

@@ -10,6 +10,7 @@ expression: checks
     row: 4
     column: 17
   fix: ~
+  parent: ~
 - kind: SysVersionSlice1Referenced
   location:
     row: 5
@@ -18,4 +19,5 @@ expression: checks
     row: 5
     column: 13
   fix: ~
+  parent: ~
 

src/flake8_annotations/mod.rs

@@ -15,7 +15,7 @@ mod tests {
 
     #[test]
     fn defaults() -> Result<()> {
-        let mut checks = test_path(
+        let checks = test_path(
             Path::new("./resources/test/fixtures/flake8_annotations/annotation_presence.py"),
             &Settings {
                 ..Settings::for_rules(vec![
@@ -33,14 +33,13 @@ mod tests {
                 ])
             },
         )?;
-        checks.sort_by_key(|check| check.location);
         insta::assert_yaml_snapshot!(checks);
         Ok(())
     }
 
     #[test]
     fn suppress_dummy_args() -> Result<()> {
-        let mut checks = test_path(
+        let checks = test_path(
             Path::new("./resources/test/fixtures/flake8_annotations/suppress_dummy_args.py"),
             &Settings {
                 flake8_annotations: flake8_annotations::settings::Settings {
@@ -58,14 +57,13 @@ mod tests {
                 ])
             },
         )?;
-        checks.sort_by_key(|check| check.location);
         insta::assert_yaml_snapshot!(checks);
         Ok(())
     }
 
     #[test]
     fn mypy_init_return() -> Result<()> {
-        let mut checks = test_path(
+        let checks = test_path(
             Path::new("./resources/test/fixtures/flake8_annotations/mypy_init_return.py"),
             &Settings {
                 flake8_annotations: flake8_annotations::settings::Settings {
@@ -83,14 +81,13 @@ mod tests {
                 ])
             },
         )?;
-        checks.sort_by_key(|check| check.location);
         insta::assert_yaml_snapshot!(checks);
         Ok(())
     }
 
     #[test]
     fn suppress_none_returning() -> Result<()> {
-        let mut checks = test_path(
+        let checks = test_path(
             Path::new("./resources/test/fixtures/flake8_annotations/suppress_none_returning.py"),
             &Settings {
                 flake8_annotations: flake8_annotations::settings::Settings {
@@ -108,14 +105,13 @@ mod tests {
                 ])
             },
         )?;
-        checks.sort_by_key(|check| check.location);
         insta::assert_yaml_snapshot!(checks);
         Ok(())
     }
 
     #[test]
     fn allow_star_arg_any() -> Result<()> {
-        let mut checks = test_path(
+        let checks = test_path(
             Path::new("./resources/test/fixtures/flake8_annotations/allow_star_arg_any.py"),
             &Settings {
                 flake8_annotations: flake8_annotations::settings::Settings {
@@ -127,14 +123,13 @@ mod tests {
                 ..Settings::for_rules(vec![CheckCode::ANN401])
             },
         )?;
-        checks.sort_by_key(|check| check.location);
         insta::assert_yaml_snapshot!(checks);
         Ok(())
     }
 
     #[test]
     fn allow_overload() -> Result<()> {
-        let mut checks = test_path(
+        let checks = test_path(
             Path::new("./resources/test/fixtures/flake8_annotations/allow_overload.py"),
             &Settings {
                 ..Settings::for_rules(vec![
@@ -146,7 +141,6 @@ mod tests {
                 ])
             },
         )?;
-        checks.sort_by_key(|check| check.location);
         insta::assert_yaml_snapshot!(checks);
         Ok(())
     }

src/flake8_annotations/plugins.rs

@@ -3,7 +3,7 @@ use rustpython_ast::{Constant, Expr, ExprKind, Stmt, StmtKind};
 
 use crate::ast::types::Range;
 use crate::ast::visitor::Visitor;
-use crate::ast::{cast, visitor};
+use crate::ast::{cast, helpers, visitor};
 use crate::checkers::ast::Checker;
 use crate::checks::{CheckCode, CheckKind};
 use crate::docstrings::definition::{Definition, DefinitionKind};
@@ -167,7 +167,7 @@ pub fn definition(checker: &mut Checker, definition: &Definition, visibility: &V
                         if checker.settings.enabled.contains(&CheckCode::ANN201) {
                             checker.add_check(Check::new(
                                 CheckKind::MissingReturnTypePublicFunction(name.to_string()),
-                                Range::from_located(stmt),
+                                helpers::identifier_range(stmt, checker.locator),
                             ));
                         }
                     }
@@ -175,7 +175,7 @@ pub fn definition(checker: &mut Checker, definition: &Definition, visibility: &V
                         if checker.settings.enabled.contains(&CheckCode::ANN202) {
                             checker.add_check(Check::new(
                                 CheckKind::MissingReturnTypePrivateFunction(name.to_string()),
-                                Range::from_located(stmt),
+                                helpers::identifier_range(stmt, checker.locator),
                             ));
                         }
                     }
@@ -309,14 +309,14 @@ pub fn definition(checker: &mut Checker, definition: &Definition, visibility: &V
                     if checker.settings.enabled.contains(&CheckCode::ANN206) {
                         checker.add_check(Check::new(
                             CheckKind::MissingReturnTypeClassMethod(name.to_string()),
-                            Range::from_located(stmt),
+                            helpers::identifier_range(stmt, checker.locator),
                         ));
                     }
                 } else if visibility::is_staticmethod(checker, cast::decorator_list(stmt)) {
                     if checker.settings.enabled.contains(&CheckCode::ANN205) {
                         checker.add_check(Check::new(
                             CheckKind::MissingReturnTypeStaticMethod(name.to_string()),
-                            Range::from_located(stmt),
+                            helpers::identifier_range(stmt, checker.locator),
                         ));
                     }
                 } else if visibility::is_init(stmt) {
@@ -328,11 +328,13 @@ pub fn definition(checker: &mut Checker, definition: &Definition, visibility: &V
                         {
                             let mut check = Check::new(
                                 CheckKind::MissingReturnTypeSpecialMethod(name.to_string()),
-                                Range::from_located(stmt),
+                                helpers::identifier_range(stmt, checker.locator),
                             );
                             if checker.patch(check.kind.code()) {
                                 match fixes::add_return_none_annotation(checker.locator, stmt) {
-                                    Ok(fix) => check.amend(fix),
+                                    Ok(fix) => {
+                                        check.amend(fix);
+                                    }
                                     Err(e) => error!("Failed to generate fix: {e}"),
                                 }
                             }
@@ -343,7 +345,7 @@ pub fn definition(checker: &mut Checker, definition: &Definition, visibility: &V
                     if checker.settings.enabled.contains(&CheckCode::ANN204) {
                         checker.add_check(Check::new(
                             CheckKind::MissingReturnTypeSpecialMethod(name.to_string()),
-                            Range::from_located(stmt),
+                            helpers::identifier_range(stmt, checker.locator),
                         ));
                     }
                 } else {
@@ -352,7 +354,7 @@ pub fn definition(checker: &mut Checker, definition: &Definition, visibility: &V
                             if checker.settings.enabled.contains(&CheckCode::ANN201) {
                                 checker.add_check(Check::new(
                                     CheckKind::MissingReturnTypePublicFunction(name.to_string()),
-                                    Range::from_located(stmt),
+                                    helpers::identifier_range(stmt, checker.locator),
                                 ));
                             }
                         }
@@ -360,7 +362,7 @@ pub fn definition(checker: &mut Checker, definition: &Definition, visibility: &V
                             if checker.settings.enabled.contains(&CheckCode::ANN202) {
                                 checker.add_check(Check::new(
                                     CheckKind::MissingReturnTypePrivateFunction(name.to_string()),
-                                    Range::from_located(stmt),
+                                    helpers::identifier_range(stmt, checker.locator),
                                 ));
                             }
                         }

src/flake8_annotations/settings.rs

@@ -5,7 +5,7 @@ use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};
 
 #[derive(
-    Debug, PartialEq, Eq, Serialize, Deserialize, Default, ConfigurationOptions, JsonSchema,
+    Debug, PartialEq, Eq, Default, Serialize, Deserialize, ConfigurationOptions, JsonSchema,
 )]
 #[serde(
     deny_unknown_fields,
@@ -51,7 +51,7 @@ pub struct Options {
     pub allow_star_arg_any: Option<bool>,
 }
 
-#[derive(Debug, Hash, Default)]
+#[derive(Debug, Default, Hash)]
 #[allow(clippy::struct_excessive_bools)]
 pub struct Settings {
     pub mypy_init_return: bool,
@@ -60,14 +60,24 @@ pub struct Settings {
     pub allow_star_arg_any: bool,
 }
 
-impl Settings {
-    #[allow(clippy::needless_pass_by_value)]
-    pub fn from_options(options: Options) -> Self {
+impl From<Options> for Settings {
+    fn from(options: Options) -> Self {
         Self {
-            mypy_init_return: options.mypy_init_return.unwrap_or_default(),
-            suppress_dummy_args: options.suppress_dummy_args.unwrap_or_default(),
-            suppress_none_returning: options.suppress_none_returning.unwrap_or_default(),
-            allow_star_arg_any: options.allow_star_arg_any.unwrap_or_default(),
+            mypy_init_return: options.mypy_init_return.unwrap_or(false),
+            suppress_dummy_args: options.suppress_dummy_args.unwrap_or(false),
+            suppress_none_returning: options.suppress_none_returning.unwrap_or(false),
+            allow_star_arg_any: options.allow_star_arg_any.unwrap_or(false),
+        }
+    }
+}
+
+impl From<Settings> for Options {
+    fn from(settings: Settings) -> Self {
+        Self {
+            mypy_init_return: Some(settings.mypy_init_return),
+            suppress_dummy_args: Some(settings.suppress_dummy_args),
+            suppress_none_returning: Some(settings.suppress_none_returning),
+            allow_star_arg_any: Some(settings.allow_star_arg_any),
         }
     }
 }

src/flake8_annotations/snapshots/ruff__flake8_annotations__tests__allow_overload.snap

@@ -6,9 +6,10 @@ expression: checks
     MissingReturnTypePublicFunction: bar
   location:
     row: 29
-    column: 4
+    column: 8
   end_location:
-    row: 30
-    column: 16
+    row: 29
+    column: 11
   fix: ~
+  parent: ~
 

src/flake8_annotations/snapshots/ruff__flake8_annotations__tests__allow_star_arg_any.snap

@@ -11,6 +11,7 @@ expression: checks
     row: 10
     column: 14
   fix: ~
+  parent: ~
 - kind:
     DynamicallyTypedExpression: foo
   location:
@@ -20,6 +21,7 @@ expression: checks
     row: 15
     column: 49
   fix: ~
+  parent: ~
 - kind:
     DynamicallyTypedExpression: a
   location:
@@ -29,6 +31,7 @@ expression: checks
     row: 40
     column: 31
   fix: ~
+  parent: ~
 - kind:
     DynamicallyTypedExpression: foo_method
   location:
@@ -38,4 +41,5 @@ expression: checks
     row: 44
     column: 69
   fix: ~
+  parent: ~
 

src/flake8_annotations/snapshots/ruff__flake8_annotations__tests__defaults.snap

@@ -6,11 +6,12 @@ expression: checks
     MissingReturnTypePublicFunction: foo
   location:
     row: 4
-    column: 0
+    column: 4
   end_location:
-    row: 5
-    column: 8
+    row: 4
+    column: 7
   fix: ~
+  parent: ~
 - kind:
     MissingTypeFunctionArgument: a
   location:
@@ -20,6 +21,7 @@ expression: checks
     row: 4
     column: 9
   fix: ~
+  parent: ~
 - kind:
     MissingTypeFunctionArgument: b
   location:
@@ -29,15 +31,17 @@ expression: checks
     row: 4
     column: 12
   fix: ~
+  parent: ~
 - kind:
     MissingReturnTypePublicFunction: foo
   location:
     row: 9
-    column: 0
+    column: 4
   end_location:
-    row: 10
-    column: 8
+    row: 9
+    column: 7
   fix: ~
+  parent: ~
 - kind:
     MissingTypeFunctionArgument: b
   location:
@@ -47,6 +51,7 @@ expression: checks
     row: 9
     column: 17
   fix: ~
+  parent: ~
 - kind:
     MissingTypeFunctionArgument: b
   location:
@@ -56,24 +61,27 @@ expression: checks
     row: 14
     column: 17
   fix: ~
+  parent: ~
 - kind:
     MissingReturnTypePublicFunction: foo
   location:
     row: 19
-    column: 0
+    column: 4
   end_location:
-    row: 20
-    column: 8
+    row: 19
+    column: 7
   fix: ~
+  parent: ~
 - kind:
     MissingReturnTypePublicFunction: foo
   location:
     row: 24
-    column: 0
+    column: 4
   end_location:
-    row: 25
-    column: 8
+    row: 24
+    column: 7
   fix: ~
+  parent: ~
 - kind:
     DynamicallyTypedExpression: a
   location:
@@ -83,6 +91,7 @@ expression: checks
     row: 44
     column: 14
   fix: ~
+  parent: ~
 - kind:
     DynamicallyTypedExpression: foo
   location:
@@ -92,6 +101,7 @@ expression: checks
     row: 49
     column: 49
   fix: ~
+  parent: ~
 - kind:
     DynamicallyTypedExpression: "*args"
   location:
@@ -101,6 +111,7 @@ expression: checks
     row: 54
     column: 26
   fix: ~
+  parent: ~
 - kind:
     DynamicallyTypedExpression: "**kwargs"
   location:
@@ -110,6 +121,7 @@ expression: checks
     row: 54
     column: 41
   fix: ~
+  parent: ~
 - kind:
     DynamicallyTypedExpression: "*args"
   location:
@@ -119,6 +131,7 @@ expression: checks
     row: 59
     column: 26
   fix: ~
+  parent: ~
 - kind:
     DynamicallyTypedExpression: "**kwargs"
   location:
@@ -128,6 +141,7 @@ expression: checks
     row: 64
     column: 41
   fix: ~
+  parent: ~
 - kind:
     MissingTypeSelf: self
   location:
@@ -137,6 +151,7 @@ expression: checks
     row: 74
     column: 16
   fix: ~
+  parent: ~
 - kind:
     DynamicallyTypedExpression: a
   location:
@@ -146,6 +161,7 @@ expression: checks
     row: 78
     column: 31
   fix: ~
+  parent: ~
 - kind:
     DynamicallyTypedExpression: foo
   location:
@@ -155,6 +171,7 @@ expression: checks
     row: 82
     column: 69
   fix: ~
+  parent: ~
 - kind:
     DynamicallyTypedExpression: "*params"
   location:
@@ -164,6 +181,7 @@ expression: checks
     row: 86
     column: 45
   fix: ~
+  parent: ~
 - kind:
     DynamicallyTypedExpression: "**options"
   location:
@@ -173,6 +191,7 @@ expression: checks
     row: 86
     column: 61
   fix: ~
+  parent: ~
 - kind:
     DynamicallyTypedExpression: "*params"
   location:
@@ -182,6 +201,7 @@ expression: checks
     row: 90
     column: 45
   fix: ~
+  parent: ~
 - kind:
     DynamicallyTypedExpression: "**options"
   location:
@@ -191,6 +211,7 @@ expression: checks
     row: 94
     column: 61
   fix: ~
+  parent: ~
 - kind:
     MissingTypeCls: cls
   location:
@@ -200,4 +221,5 @@ expression: checks
     row: 104
     column: 15
   fix: ~
+  parent: ~
 

src/flake8_annotations/snapshots/ruff__flake8_annotations__tests__mypy_init_return.snap

@@ -6,10 +6,10 @@ expression: checks
     MissingReturnTypeSpecialMethod: __init__
   location:
     row: 5
-    column: 4
+    column: 8
   end_location:
-    row: 6
-    column: 11
+    row: 5
+    column: 16
   fix:
     content: " -> None"
     location:
@@ -18,14 +18,15 @@ expression: checks
     end_location:
       row: 5
       column: 22
+  parent: ~
 - kind:
     MissingReturnTypeSpecialMethod: __init__
   location:
     row: 11
-    column: 4
+    column: 8
   end_location:
-    row: 12
-    column: 11
+    row: 11
+    column: 16
   fix:
     content: " -> None"
     location:
@@ -34,13 +35,15 @@ expression: checks
     end_location:
       row: 11
       column: 27
+  parent: ~
 - kind:
     MissingReturnTypePrivateFunction: __init__
   location:
     row: 40
-    column: 0
+    column: 4
   end_location:
-    row: 41
-    column: 7
+    row: 40
+    column: 12
   fix: ~
+  parent: ~
 

src/flake8_annotations/snapshots/ruff__flake8_annotations__tests__suppress_none_returning.snap

@@ -6,18 +6,20 @@ expression: checks
     MissingReturnTypePublicFunction: foo
   location:
     row: 45
-    column: 0
+    column: 4
   end_location:
-    row: 46
-    column: 15
+    row: 45
+    column: 7
   fix: ~
+  parent: ~
 - kind:
     MissingReturnTypePublicFunction: foo
   location:
     row: 50
-    column: 0
+    column: 4
   end_location:
-    row: 55
-    column: 14
+    row: 50
+    column: 7
   fix: ~
+  parent: ~
 

src/flake8_bandit/mod.rs

@@ -21,13 +21,12 @@ mod tests {
     #[test_case(CheckCode::S107, Path::new("S107.py"); "S107")]
     fn checks(check_code: CheckCode, path: &Path) -> Result<()> {
         let snapshot = format!("{}_{}", check_code.as_ref(), path.to_string_lossy());
-        let mut checks = test_path(
+        let checks = test_path(
             Path::new("./resources/test/fixtures/flake8_bandit")
                 .join(path)
                 .as_path(),
             &settings::Settings::for_rule(check_code),
         )?;
-        checks.sort_by_key(|check| check.location);
         insta::assert_yaml_snapshot!(snapshot, checks);
         Ok(())
     }

src/flake8_bandit/snapshots/ruff__flake8_bandit__tests__S101_S101.py.snap

@@ -10,6 +10,7 @@ expression: checks
     row: 2
     column: 11
   fix: ~
+  parent: ~
 - kind: AssertUsed
   location:
     row: 8
@@ -18,6 +19,7 @@ expression: checks
     row: 8
     column: 17
   fix: ~
+  parent: ~
 - kind: AssertUsed
   location:
     row: 11
@@ -26,4 +28,5 @@ expression: checks
     row: 11
     column: 17
   fix: ~
+  parent: ~
 

src/flake8_bandit/snapshots/ruff__flake8_bandit__tests__S102_S102.py.snap

@@ -10,6 +10,7 @@ expression: checks
     row: 3
     column: 17
   fix: ~
+  parent: ~
 - kind: ExecUsed
   location:
     row: 5
@@ -18,4 +19,5 @@ expression: checks
     row: 5
     column: 13
   fix: ~
+  parent: ~
 

src/flake8_bandit/snapshots/ruff__flake8_bandit__tests__S104_S104.py.snap

@@ -10,6 +10,7 @@ expression: checks
     row: 9
     column: 9
   fix: ~
+  parent: ~
 - kind: HardcodedBindAllInterfaces
   location:
     row: 10
@@ -18,6 +19,7 @@ expression: checks
     row: 10
     column: 9
   fix: ~
+  parent: ~
 - kind: HardcodedBindAllInterfaces
   location:
     row: 14
@@ -26,6 +28,7 @@ expression: checks
     row: 14
     column: 14
   fix: ~
+  parent: ~
 - kind: HardcodedBindAllInterfaces
   location:
     row: 18
@@ -34,4 +37,5 @@ expression: checks
     row: 18
     column: 17
   fix: ~
+  parent: ~
 

src/flake8_bandit/snapshots/ruff__flake8_bandit__tests__S105_S105.py.snap

@@ -11,6 +11,7 @@ expression: checks
     row: 12
     column: 19
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -20,6 +21,7 @@ expression: checks
     row: 13
     column: 16
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -29,6 +31,7 @@ expression: checks
     row: 14
     column: 17
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -38,6 +41,7 @@ expression: checks
     row: 15
     column: 14
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -47,6 +51,7 @@ expression: checks
     row: 16
     column: 17
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -56,6 +61,7 @@ expression: checks
     row: 17
     column: 16
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -65,6 +71,7 @@ expression: checks
     row: 18
     column: 18
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -74,6 +81,7 @@ expression: checks
     row: 19
     column: 26
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -83,6 +91,7 @@ expression: checks
     row: 20
     column: 26
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -92,6 +101,7 @@ expression: checks
     row: 22
     column: 24
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -101,6 +111,7 @@ expression: checks
     row: 23
     column: 20
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -110,6 +121,7 @@ expression: checks
     row: 24
     column: 22
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -119,6 +131,7 @@ expression: checks
     row: 25
     column: 19
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -128,6 +141,7 @@ expression: checks
     row: 26
     column: 22
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -137,6 +151,7 @@ expression: checks
     row: 27
     column: 21
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -146,6 +161,7 @@ expression: checks
     row: 28
     column: 23
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -155,6 +171,7 @@ expression: checks
     row: 29
     column: 31
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -164,6 +181,7 @@ expression: checks
     row: 30
     column: 31
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -173,6 +191,7 @@ expression: checks
     row: 34
     column: 23
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -182,6 +201,7 @@ expression: checks
     row: 38
     column: 27
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -191,6 +211,7 @@ expression: checks
     row: 39
     column: 24
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -200,6 +221,7 @@ expression: checks
     row: 40
     column: 25
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -209,6 +231,7 @@ expression: checks
     row: 41
     column: 22
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -218,6 +241,7 @@ expression: checks
     row: 42
     column: 25
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -227,6 +251,7 @@ expression: checks
     row: 43
     column: 24
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -236,6 +261,7 @@ expression: checks
     row: 44
     column: 26
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -245,6 +271,7 @@ expression: checks
     row: 46
     column: 20
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -254,6 +281,7 @@ expression: checks
     row: 47
     column: 17
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -263,6 +291,7 @@ expression: checks
     row: 48
     column: 18
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -272,6 +301,7 @@ expression: checks
     row: 49
     column: 15
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -281,6 +311,7 @@ expression: checks
     row: 50
     column: 18
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -290,6 +321,7 @@ expression: checks
     row: 51
     column: 17
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -299,6 +331,7 @@ expression: checks
     row: 52
     column: 19
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordString: s3cr3t
   location:
@@ -308,4 +341,35 @@ expression: checks
     row: 53
     column: 28
   fix: ~
+  parent: ~
+- kind:
+    HardcodedPasswordString: "1\n2"
+  location:
+    row: 55
+    column: 12
+  end_location:
+    row: 55
+    column: 18
+  fix: ~
+  parent: ~
+- kind:
+    HardcodedPasswordString: "3\t4"
+  location:
+    row: 58
+    column: 12
+  end_location:
+    row: 58
+    column: 18
+  fix: ~
+  parent: ~
+- kind:
+    HardcodedPasswordString: "5\r6"
+  location:
+    row: 61
+    column: 12
+  end_location:
+    row: 61
+    column: 18
+  fix: ~
+  parent: ~
 

src/flake8_bandit/snapshots/ruff__flake8_bandit__tests__S106_S106.py.snap

@@ -11,4 +11,5 @@ expression: checks
     row: 13
     column: 25
   fix: ~
+  parent: ~
 

src/flake8_bandit/snapshots/ruff__flake8_bandit__tests__S107_S107.py.snap

@@ -11,6 +11,7 @@ expression: checks
     row: 5
     column: 37
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordDefault: posonly
   location:
@@ -20,6 +21,7 @@ expression: checks
     row: 13
     column: 53
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordDefault: kwonly
   location:
@@ -29,6 +31,7 @@ expression: checks
     row: 21
     column: 46
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordDefault: posonly
   location:
@@ -38,6 +41,7 @@ expression: checks
     row: 29
     column: 47
   fix: ~
+  parent: ~
 - kind:
     HardcodedPasswordDefault: kwonly
   location:
@@ -47,4 +51,5 @@ expression: checks
     row: 29
     column: 69
   fix: ~
+  parent: ~
 

src/flake8_blind_except/mod.rs

@@ -15,13 +15,12 @@ mod tests {
     #[test_case(CheckCode::BLE001, Path::new("BLE.py"); "BLE001")]
     fn checks(check_code: CheckCode, path: &Path) -> Result<()> {
         let snapshot = format!("{}_{}", check_code.as_ref(), path.to_string_lossy());
-        let mut checks = test_path(
+        let checks = test_path(
             Path::new("./resources/test/fixtures/flake8_blind_except")
                 .join(path)
                 .as_path(),
             &settings::Settings::for_rule(check_code),
         )?;
-        checks.sort_by_key(|check| check.location);
         insta::assert_yaml_snapshot!(snapshot, checks);
         Ok(())
     }

src/flake8_blind_except/snapshots/ruff__flake8_blind_except__tests__BLE001_BLE.py.snap

@@ -11,6 +11,7 @@ expression: checks
     row: 25
     column: 20
   fix: ~
+  parent: ~
 - kind:
     BlindExcept: Exception
   location:
@@ -20,6 +21,7 @@ expression: checks
     row: 31
     column: 16
   fix: ~
+  parent: ~
 - kind:
     BlindExcept: Exception
   location:
@@ -29,6 +31,7 @@ expression: checks
     row: 42
     column: 16
   fix: ~
+  parent: ~
 - kind:
     BlindExcept: BaseException
   location:
@@ -38,6 +41,7 @@ expression: checks
     row: 45
     column: 24
   fix: ~
+  parent: ~
 - kind:
     BlindExcept: Exception
   location:
@@ -47,6 +51,7 @@ expression: checks
     row: 54
     column: 16
   fix: ~
+  parent: ~
 - kind:
     BlindExcept: Exception
   location:
@@ -56,6 +61,7 @@ expression: checks
     row: 60
     column: 16
   fix: ~
+  parent: ~
 - kind:
     BlindExcept: BaseException
   location:
@@ -65,4 +71,5 @@ expression: checks
     row: 62
     column: 20
   fix: ~
+  parent: ~