**To Reproduce**

[mervy93]

To Reproduce

Unformatted code:

def main():
    if a:

        # Comment
        def b():
            pass

    if b:
        def c():
            pass

Running black --preview:

def main():
    if a:
        # Comment
        def b():
            pass

    if b:

        def c():
            pass

Expected behavior

Empty line should be consistent added (or removed) between the code block open and inner function:

def main():
    if a:

        # Comment
        def b():
            pass

    if b:

        def c():
            pass

Or,

def main():
    if a:
        # Comment
        def b():
            pass

    if b:
        def c():
            pass

Additional context

I did a bisect and this was caused by psf/black#3035.

Note that if the inner function doesn't have a leading comment, it won't remove the empty line:

def main():
    if a:

        def b():
            pass

        def c():
            pass

Thus I believe this is an undesired behavior change in #3035?

Originally posted by @yilei in psf/black#3300