bug#59068: 29.0.50; noverlay causing indirect append issues

[Eli Zaretskii]

> Cc: 59068@debbugs.gnu.org
> From: Gerd Möllmann <gerd.moellmann@gmail.com>
> Date: Sun, 06 Nov 2022 06:25:19 +0100
> 
> Michael Kleehammer <michael@kleehammer.com> writes:
> 
> > I compiled master at b7a76f288cc and two different indirect editing
> > packages, edit-indirect and separedit,
> >
> 
> Hi Michael.  There have been a number of fixes related to indirect
> buffers very recently.  Could you please try with the latest HEAD?

And if the current master doesn't solve that, I would appreciate
recipes starting from "emacs -Q" that didn't involve additional
packages.  Just lift enough code from those packages to demonstrate
the problem in vanilla Emacs.

Thanks.