Fix for redundant-none-literal (PYI061) is marked as safe but should not be

[user27182]

Summary

PYI061 is marked as a safe fix but it's not, and breaks code that uses typing.get_args to do input validation based on type hints. E.g. the two outputs from get_args are not the same before and after the fix

>>> from typing import Literal, get_args
>>> options = Literal['foo', 'bar', None]  # violates PYI061
>>> print(get_args(options))
('foo', 'bar', None)

>>> options = Literal['foo', 'bar'] | None  # auto-fix for PYI061
>>> print(get_args(options))
(typing.Literal['foo', 'bar'], <class 'NoneType'>)

This auto-fix breaks this code:

def thing(arg: options):
    # Validate input
    assert arg in get_args(options)
    # Do useful stuff
    ...

Version

v0.13.3 (from pre-commit mirror)