bug#51605: Fwd: [PATCH] Update themes to support mode-line

[Eli Zaretskii <eliz@gnu.org>]

> From: Pedro Andres Aranda Gutierrez <paaguti@gmail.com>
> Date: Tue, 7 Dec 2021 07:23:11 +0100
> Cc: Stefan Kangas <stefan@marxist.se>, Eli Zaretskii <eliz@gnu.org>, 51605@debbugs.gnu.org
> 
> you are right. An image is worth more than 1000 words ;-)
> 
> Here you are. +/- the same are in the same file, with a theme I created with ThemeCreator
> (https://mswift42.github.io/themecreator/) 
> My main point for having line-number as fringe is the space between the line number and the buffer. It's not
> just the practical side of it (i.e. identifying a space too much or missing), it's also something more
> philosophical: i.e. the the difference between buffer and the rest.

What happens if there's display margin between the fringe and the line
numbers?

In any case, I don't understand why you insist on using the fringe as
the basic face here.  The line numbers have nothing to do with the
fringe, and if you assume that the fringe's background will always be
a pale, shadowy color, that assumption can easily be false.  E.g., in
my sessions the fringe has a very vivid color.  It's a problematic
dependency.