bug#34639: 26.1; Custom themes break terminal when switching to org-mode

[Eli Zaretskii]

> From: Richard Stallman <rms@gnu.org>
> Cc: contovob@tcd.ie, kisik21@fireburn.ru, 34639@debbugs.gnu.org
> Date: Tue, 26 Feb 2019 23:05:37 -0500
> 
>   > Not really possible, since there are user-visible differences.
> 
> What are the differences?

The main (perhaps the only) one is that linum.el displays line numbers
in the display margin, whereas the native line numbers are displayed
in the text area.

> Could we envision one feature that would satisfy the users
> of both of these two?

I don't think so, because staying away of the display margin was an
explicit design goal of the native line-number display, to avoid
conflicts with other packages that want to use the display margins for
something.