9085f18353
@AlexWaygood discovered that even though we've been propagating specializations to _parent_ base classes correctly, we haven't been passing them on to _grandparent_ base classes: https://github.com/astral-sh/ruff/pull/17832#issuecomment-2854360969 ```py class Bar[T]: x: T class Baz[T](Bar[T]): ... class Spam[T](Baz[T]): ... reveal_type(Spam[int]().x) # revealed: `T`, but should be `int` ``` This PR updates the MRO machinery to apply the current specialization when starting to iterate the MRO of each base class.
Markdown files within the mdtest/ subdirectory are tests of type inference and type checking;
executed by the tests/mdtest.rs integration test.
See crates/ty_test/README.md for documentation of this test format.