bug#63790: 30.0.50; prog-fill-reindent-defun regression

[Juri Linkov]

>>    (re-search-forward "\\s-*\\s<" (line-end-position) t)
>
> It's looking for a comment that begins after point (possibly preceded by
> whitespace). There is no comment after point in the presented scenario.
>
>> It's nil in the reported case, so 'fill-paragraph' is not called.
>
> I guess when there is an active region, we would force the behavior to
> "refill" the region, no matter whether it is inside a comment, or contains
> a comment, or outside of any comments and simply contains code?

While 'prog-fill-reindent-defun' doesn't support indentation of an
arbitrary region of code and indents only the top-level list (defun),
it looks like the right thing is to fill the region.

I still don't understand why 'M-q' now does the same what 'C-M-q' was
doing all the time with code indentation?  Also why 'prog-fill-reindent-defun'
can't indent the region of code, but only the region of comments?

Shouldn't 'M-q' only refill comments, and 'C-M-q' only indent code, as before?