Re: Emacs's handling of line numbers [from bug#5042]

[Eli Zaretskii]

> From: Juanma Barranquero <address@hidden>
> Date: Sat, 17 Apr 2010 23:17:26 +0200
> Cc: address@hidden, address@hidden, address@hidden
> 
> On Sat, Apr 17, 2010 at 23:04, Eli Zaretskii <address@hidden> wrote:
> 
> > Why do you think they should be distinguished?
> 
> It would perhaps be useful to distinguish between user narrowing and
> program narrowing (the one used by Info, rmail, etc., I mean).

I don't see why.  Both use-cases limit commands to a portion of a
buffer.  What's the difference between these two classes of narrowing,
and how would distinguishing between them be useful?