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

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: 56682@debbugs.gnu.org,  Eli Zaretskii <eliz@gnu.org>,  Dmitry Gutov
>  <dgutov@yandex.ru>
> Date: Tue, 16 Aug 2022 09:43:56 -0400
> 
> > And, by the way, what could be a better solution?
> 
> A solution that is humble enough to leave an open door for ad-hoc
> case-specific handling of the problem.

I don't get it: a way to provide such an open door was described here
many days ago.  It's not like you, Stefan, lack write access to the
repository.  What am I missing?