ssort reformats dummy classes (conflict with black 24)

[slafs]

In black v24 a few new rules become stable.
One of them is

Dummy class and function implementations consisting only of ... are formatted more compactly (#3796)

Most of the dummy bodies adjustment black makes are fine with ssort,
but a dummy class isn't.

Consider this simple file:

class MyException(Exception):
    ...

black v24 now re-formats it as:

class MyException(Exception): ...

while ssort re-formats it back to the original "shape".

I think this is a bug on ssort side.

We have both ssort and black configured in our pre-commit setup
and now we're unable to use them together.

[bwhmather]

This certainly breaks our "if code is ordered correctly then it won't be changed rule".

[bwhmather]

Thank you for reporting. Have published a fix in 0.12.4.