Re: #17526 ## Summary Adds tests to red knot and `linter.rs` for the semantic syntax. Specifically add tests for `ReboundComprehensionVariable`, `DuplicateTypeParameter`, and `MultipleCaseAssignment`. Refactor the `test_async_comprehension_in_sync_comprehension` → `test_semantic_error` to be more general for all semantic syntax test cases. ## Test Plan This is a test. ## Question I'm happy to contribute more tests the coming days. Should that happen here or should we merge this PR such that the refactor `test_async_comprehension_in_sync_comprehension` → `test_semantic_error` is available on main and others can chime in, too?
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.