Apply ruff/flake8-bugbear preview rule B901

[DimitriPapadopoulos]

See return-in-generator (B901):

Using return {value} in a generator function was syntactically invalid in Python 2. In Python 3 return {value} can be used in a generator; however, the combination of yield and return can lead to confusing behavior, as the return statement will cause the generator to raise StopIteration with the value provided, rather than returning the value to the caller.