bug#56682: Fix the long lines font locking related slowdowns

[Eli Zaretskii]

> Date: Thu, 04 Aug 2022 01:26:04 +0000
> From: Gregory Heytings <gregory@heytings.org>
> cc: gerd.moellmann@gmail.com, 56682@debbugs.gnu.org, 
>     Eli Zaretskii <eliz@gnu.org>, monnier@iro.umontreal.ca
> 
> > Branch feature/long-lines-and-font-locking, revision cd41ce8c6c1079 from 
> > July 25. That branch is not there anymore, so let me know if I should 
> > re-test this with some later version of your work.
> 
> That branch doesn't exist anymore, it has been merged in master.

Right.

Gregory, is there a reason why the long-lines-improvements branch is
not yet merged?  I think it already includes important improvements
that should be exposed to a larger population for testing and
feedback.

If you for some reason prefer to keep that branch active, can you
please merge the current master to it, so that the changes in
narrow-to-region will be on the branch?  As things are now, the
problems you solved on master in that part are not yet solved on the
branch, and so working on the branch runs the risk of hitting problems
unrelated to changes in display code.

Thanks.