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

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: juri@linkov.net,  41250@debbugs.gnu.org,  arthur.miller@live.com
> Date: Fri, 02 Oct 2020 16:10:41 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > How about making char-displayable-p accept an optional argument, a
> > frame for which to perform the test?
> 
> I thought char-displayable-p worked based on the current frame?

The selected-frame, yes.  I though that wasn't good enough in this
case, but maybe I was confused?  If the latter, what exactly is the
problem that caused you to say "The variable doesn't work as is
(because of the problem of mixed frames)"?