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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Native display of line numbers
Date: Mon, 19 Jun 2017 18:13:29 +0300
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> Date: Mon, 19 Jun 2017 10:04:18 +0200
> From: martin rudalics <rudalics@gmx.at>
> CC: emacs-devel@gnu.org
> 
> If you intend to keep the current implementation, I see no need for such
> a primitive.  The window code doesn't handle ‘line-prefix’ or
> ‘wrap-prefix’ specially either.  Things will get problematic as soon as
> you want to display line numbers outside the fringes or margins.  But
> IIUC you currently don't have any intentions to do that.

Right.  Thanks, I was thinking along the same lines, but wasn't sure I
didn't miss anything.  I'm encouraged now.