bug#57837: 29.0.50; fit-window-to-buffer should reposition the buffer

[Gregory Heytings]

> > > > > > Is that a problem? I mean, is it possible for the point to be 
> > > > > > invisible?
> > > >
> > > > No, Emacs does its best to ensure that point is always visible.
> > >
> > > is it possible for Emacs return nil from (pos-visible-in-window-p 
> > > (point))
> >
> > It is not impossible, but if it happens, it's a bug.
>
> Actually, it _is_ possible and is not a bug, but only as long as 
> redisplay didn't happen.

Indeed, I wrote too fast.  What I meant, in the context of the discussion, 
was: It is not impossible after redisplay, but if it happens, it's a bug.