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

[Eli Zaretskii <eliz@gnu.org>]

> Cc: 27103@debbugs.gnu.org
> From: Clément Pit--Claudel <clement.pitclaudel@live.com>
> Date: Sun, 28 May 2017 16:18:02 -0400
> 
> >>   (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.
> 
> I didn't realize that this was possible. It fits my use case very nicely :) In the (defun example, I can just put the line-prefix property on the defun, and everything works perfectly.
> 
> I wonder if we should mention this in the manual. Maybe in the "display specs" section, where (fringe …) is described, we could add this:
> 
>   `left-fringe' and `right-fringe' are replacing specs: the span of text that they apply to is made invisible.  To add a fringe to a line without hiding any of its contents, put the fringe property on the before-string of an overlay or on the line-prefix of your text.

That's the kind of "howto" stuff that doesn't really belong to a
manual.

> >> Anything bad with this?
> > 
> > It's just a display property.  Nothing wrong with that, of course.
> 
> Thanks!

OK, closing.