## Summary Follow up from https://github.com/astral-sh/ruff/pull/21411. Again, there are more things that could be improved here (like the diagnostics for `lists`, or extending what we have for `dict` to `OrderedDict` etc), but that will have to be postponed.
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.