bug#27103: Should show-trailing-whitespace highlight specified spaces?

[Eli Zaretskii]

> Cc: 27103@debbugs.gnu.org
> From: Clément Pit--Claudel <clement.pitclaudel@live.com>
> Date: Sun, 28 May 2017 15:43:52 -0400
> 
> > Maybe we could extend the line-prefix property to support left-fringe
> > and right-fringe specs.
> 
> Hey, it works!
> 
>   (insert (propertize "AA" 'line-prefix (propertize "_" 'display 
> '(left-fringe right-arrow))))

That's not what I meant, but if you are happy, it's fine with me.

> Anything bad with this?

It's just a display property.  Nothing wrong with that, of course.