bug#13791: 24.3.50; scroll-margin docstring says "recenter"

[Dmitry Gutov]

On 23.02.2013 22:47, Eli Zaretskii wrote:
> > Date: Sat, 23 Feb 2013 22:08:56 +0400
> > From: Dmitry Gutov <dgutov@yandex.ru>
> > CC: 13791@debbugs.gnu.org
> >
> > But I'm not sure we're talking about the same thing.
>
> I think we are.
>
> > I meant to describe what will happen to the window when point "gets
> > within this many lines of the top or bottom of the window", not when
> > it moves outside the visible area.
>
> That's how I understood it.  But if you lean on the up or down key,
> you can easily cause point go off the screen before Emacs enters
> redisplay.

Yes, but in this case point is not "within this many lines of the top or 
bottom of the window" anymore technically.

Or maybe it is, if you interpret "top" and "bottom" as just buffer lines 
and "gets within" as "within absolute distance". In this case we can 
additionally qualify the conditions:

"whenever point gets within this many lines of the top or bottom of the 
window without going off screen."

Either way, this description is more accurate than what we have currently.

Alternatively, we can mention the "off screen" situation in the second 
paragraph, where the values of `scroll-conservatively' are considered.