bug#56637: 28.1.90; [FR] Allow a way around font-lock-mode being unconditionally disabled in " *hidden*" buffers

[Eli Zaretskii <eliz@gnu.org>]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: yantar92@gmail.com,  56637@debbugs.gnu.org
> Date: Wed, 20 Jul 2022 11:15:20 -0400
> 
> >> But I can't see why we shouldn't accommodate those needs more directly.
> >
> > I can: we don't need, and really shouldn't, attempt to cater to each
> > corner use case in core.  Doing that (and we've been doing that for
> > quite some time) makes Emacs a larger and less maintainable monster
> > than it needs to be or already is.
> 
> I can't see why adding the patch below would make it less maintainable.

Well, I explained that.  If you still don't see it, I guess we'll have
to agree to disagree.

> It sure seems much cleaner than the horror quoted above (which suffers
> from all kinds of corner case misbehaviors).

The horror quoted above won't be in Emacs, so it is of no concern to
us.

> > You already have one symptom of the monster's size: I already cannot
> > tell which hooks are and aren't running in temporary buffers without
> > consulting the sources.  Way to go, Emacs!
> 
> And for that reason, I think we should try and avoid such special cases
> (such the special case of not enabling font-lock in temp buffers), by
> replacing them with other measures which give similar results but
> without such special casing.

Temporary buffers _are_ special cases, whether we want it or not.