bug#56008: 29.0.50; image-mode buffer scrolled down automatically

[Eli Zaretskii]

> Cc: 56008@debbugs.gnu.org, visuweshm@gmail.com
> Date: Thu, 16 Jun 2022 18:48:26 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> 
> > From: Lars Ingebrigtsen <larsi@gnus.org>
> > Cc: Visuwesh <visuweshm@gmail.com>,  56008@debbugs.gnu.org
> > Date: Thu, 16 Jun 2022 16:05:20 +0200
> > 
> > Eli Zaretskii <eliz@gnu.org> writes:
> > 
> > > No, this _is_ specific to eww and shr.  Well, in a way: shr.el does
> > > something which directly causes this.  Stay tuned.
> > 
> > I wondered whether it had something to do with shr-string-pixel-width
> > and friends (which does play games with windows), but stubbing those out
> > still led to the same problems, apparently.
> > 
> > (shr-string-pixel-width should be replaced with string-pixel-width (sort
> > of), though.)
> 
> It's shr-pixel-column, which calls set-window-buffer.

And in addition, shr-insert-document was resetting the hscroll of the
window it just happened to use for its rendering job.

This bug should be fixed now on the master branch.