60f2e67454
## Summary This implements a new approach to silencing `unresolved-reference` diagnostics by keeping track of the reachability of each use of a symbol. The changes merged in https://github.com/astral-sh/ruff/pull/17169 are still needed for the "Use of variable in nested function" test case, but that could also be solved in another way eventually (see https://github.com/astral-sh/ruff/issues/15777). We can use the same technique to silence `unresolved-import` and `unresolved-attribute` false-positives, but I think this could be merged in isolation. ## Test Plan New Markdown tests, ecosystem tests
Markdown files within the mdtest/ subdirectory are tests of type inference and type checking;
executed by the tests/mdtest.rs integration test.
See crates/red_knot_test/README.md for documentation of this test format.