bug#40332: 28.0.50; dired-readin binds inhibit-modification-hooks

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Mon, 30 Mar 2020 15:47:17 -0400
> Cc: 40332-done@debbugs.gnu.org, Yuan Fu <casouri@gmail.com>
> 
> +      ;; We used to bind `inhibit-modification-hooks' to try and speed up
> +      ;; execution, in particular, to prevent the font-lock hook from running
> +      ;; until the directory is all read in.
> +      ;; I strongly suspect that this was only useful in Emacs<21, because
> +      ;; jit-lock made it a non-issue.
> +      ;; Nevertheless, I used `combine-change-calls' which provides the
> +      ;; same performance advantages, just in case.

FWIW, according to "git log", the change which introduced
inhibit-modification-hooks was made by RMS in Dec 2008, so it's
unlikely that had anything to do with Emacs before v21.  Maybe we
should augment that part of the comment?