bug#13949: 24.4.1; `fill-paragraph' should not always put the buffer as modified

[Eli Zaretskii]

> Cc: 13949@debbugs.gnu.org
> From: Jaakov <j_k_v@ro.ru>
> Date: Tue, 22 Mar 2016 18:40:13 +0100
> 
> > I disagree.  I think Dani is right: the buffer text is changed (at
> > least twice), which turns on the modified flag.  This situation is
> > equivalent to inserting a character and then deleting it: the buffer
> > stays modified, although its text is identical to the original one.
> >
> Objection for the following reason:
> - It's a human who types in and deletes a charter.
> - fill-paragraph is not a human, but a routine.

We obviously disagree.  But it's pointless to continue the argument,
because no matter whether this is a bug or a feature request, it must
be coded to be fixed.

So once again: patches are welcome, thanks in advance.