Misleading return type when using merge_init_into_class

[monosans]

Currently, when merge_init_into_class and show_signature_annotations are enabled, the class signature looks like None is returned when the class is called, which looks strange and misleading:

SomeClass() -> None 

The simplest solution seems to be hiding the return type for classes. The ideal solution is to take the return type from __new__.

[pawamoy]

I didn't even notice that, thanks. I agree that we could simply remove the return type.