ruff

3cf44e40 - [red-knot] Implicit instance attributes in generic methods (#17769)

[red-knot] Implicit instance attributes in generic methods (#17769) ## Summary Add the ability to detect instance attribute assignments in class methods that are generic. This does not address the code duplication mentioned in #16928. I can open a ticket for this after this has been merged. closes #16928 ## Test Plan Added regression test.