Fix false positive issue with '_' variable

[leoncleonc]

Fix issue with underscore variable name.

def foo(bar: str) -> None:
    print(bar)

for _ in range(10):  # <- variable names that shadow builtins are not allowed Flake8 (VNE003)
    foo('hello')

[Arondit]

@leoncleonc hello. Could you please also make a test for this case? Thank you very much for your help.