bug#41250: 28.0.50; Dired displays unconditionally ls-switches on modeline

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Wed, 30 Sep 2020 21:30:56 +0200
> Cc: 41250@debbugs.gnu.org, Arthur Miller <arthur.miller@live.com>
> 
> Would anybody mind very much if I added a `string-truncate-right' that
> does all this automatically, and amend `string-truncate-left' in the
> same way?  I.e., use (if (char-displayable-p ?…) "…" "...").

That could be useful, but it would be better if the name hinted on the
fact that char-displayable-p is involved.