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

[Eli Zaretskii]

> Cc: 27103-done@debbugs.gnu.org
> From: Clément Pit--Claudel <clement.pitclaudel@live.com>
> Date: Sun, 28 May 2017 22:33:04 -0400
> 
> >>   `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.
> 
> Where does it belong, then?

Some tutorial, or the wiki, IMO.