RUF012 shouldn't complain when type hint is not present

[harshil21]

The following snippet produces an error which I think it shouldn't since there is no type annotation for that variable:

# test.py
class A:
    var = ["hey", "there"]

This gets particularly annoying in test suites, since adding type hints there (specially in this case) is not required imo.

Command

ruff test.py --select RUF --isolated

tests/ruff.py:2:11: RUF012 Mutable class attributes should be annotated with `typing.ClassVar`
Found 1 error.

Version

ruff 0.0.274

[scastlara]

related #5243

[harshil21]

yeah just opened within a minute of each other :D

[charliermarsh]

(Closing as a duplicate of #5244.)

[Thomasdezeeuw]

(Closing as a duplicate of #5244.)

I think you meant #5243, since this is #5244.