bug#14170: 24.3; linum won't create all overlays after a folding

[Eli Zaretskii]

> From: Stefan Monnier <monnier@IRO.UMontreal.CA>
> Cc: rgm@gnu.org, 14170@debbugs.gnu.org
> Date: Mon, 15 Apr 2013 19:00:46 -0400
> 
> > +(defvar margin-side nil)
> 
> I suspect you wanted to use nlinum--margin-side instead, right?

Yes, I suspect so, too.

> Hmm... since the default value of bidi-paragraph-direction is nil, that
> means that this will change the default behavior and put a margin in
> each side.

Not in the major modes where line numbers are normally wanted: every
mode that inherits from prog-mode has its bidi-paragraph-direction set
as left-to-right by default.

For other modes, yes.

> Maybe we should decide nlinum--margin-side "lazily" based on the
> buffer's content, so if bidi-paragraph-direction is nil we only set
> a margin on the sides where we do display line numbers.

Patches are welcome ;-)