bug#60467: 30.0.50; primitive-undo: Changes to be undone by function different from announced

[Gregory Heytings]

> > > Stefan, can you please look into this?
> >
> > FYI, that issue is fixed with the 
> > Fix-combine-change-call-with-timestamps patch.
>
> Oh, but I don't think this is OK for the `emacs-29` branch, so we still 
> need a more targetted fix for the `emacs-29` branch.

Well, that bug was already discussed at length six months ago, and the 
minimal change that was in the end installed (59c3c53efa) introduced a new 
bug.  Should we design another minimal change, at the risk of introducing 
another bug?  ISTM that the safe thing to do is the refactoring that was 
suggested.