Re: Unicode confusables and reordering characters considered harmful, a simple solution

[Eli Zaretskii]

> Date: Wed, 03 Nov 2021 19:02:19 +0000
> From: Gregory Heytings <gregory@heytings.org>
> cc: Eli Zaretskii <eliz@gnu.org>, cpitclaudel@gmail.com, stefan@marxist.se, 
>     emacs-devel@gnu.org, db48x@db48x.net, monnier@iro.umontreal.ca, 
>     Yuri Khan <yuri.v.khan@gmail.com>
> 
> 
> >> Anyway, if one wants to be able to highlight certain characters on 
> >> display, one could also use highlight-regexp, I think.
> >
> > Or markchars.el with markchars-what customized to markchars-confusables.
> >
> 
> Neither would work AFAICS, because these characters are glyphless. 
> Highlighting a glyphless character will not make it more visible.

??? Of course, it will make it more visible: if the face has a
distinct background.  The "thin space" display looks like whitespace,
and whitespace can have background color to make it stand out.