bug#36858: 27.0.50; display bugs with display-fill-column-indicator-mode

[Eli Zaretskii]

> Date: Sat, 10 Aug 2019 13:45:37 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 36858@debbugs.gnu.org
> 
> > From: Davor Rotim <rotim.davor@gmail.com>
> > Date: Sat, 10 Aug 2019 12:12:55 +0200
> > 
> > Sorry, forgot to list the relevant org-mode faces that I have customized:
> 
> Thanks.
> 
> > Please note that this is not relevant to only Org mode, this display bug 
> > happens with all faces
> > where I turn on the overline or underline property. For example 
> > `font-lock-comment-face' will show
> > the same bug if I turn on the overline or underline property.
> 
> I understand, I just need an easy example to work with.

OK, I see the reason for the problem now: it's because org.el places
the face on the newline that ends the line, not just on the text of
that line.

Can one of the Org developers (CC'ed) please tell why Org does this?
Why not limit the face to the actual text, and avoid putting the face
on the newline?

Thanks.