## Summary Part of #13694 Seems there a bit more to cover regarding `in` and other types, but i can cover them in different PRs ## Test Plan Add `in.md` file in narrowing conditionals folder --------- Co-authored-by: Carl Meyer <carl@astral.sh>
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.