Function definitions inside if blocks introduce whitespace

[nyanpasu64]

Describe the style change

Right now, if you def a function inside an if block, a new line is introduced between the if and the def. I think this looks too spaced out and unpleasant to read.

Examples in the current Black style

if condition:

    def func():
        ...

    func()

Desired style

if condition:
    def func():
        ...

    func()

Additional context Add any other context about the problem here.

This is related to #196, but that issue seems to be for functions defined directly in other functions, not in blocks.

[ichard26]

This falls under issue #450 (via #377). Just recently closed #1691 for the same reason.