bug#62700: 29.0.60; minibuffer-{previous,next,choose}-completion behave unintuitively when point is not at end of buffer

[Eli Zaretskii]

> Cc: 62700@debbugs.gnu.org, Spencer Baugh <sbaugh@janestreet.com>
> From: sbaugh@catern.com
> Date: Fri, 07 Apr 2023 21:02:47 +0000 (UTC)
> 
> Juri Linkov <juri@linkov.net> writes:
> > Changing the API will definitely cause problems with 
> > backwards-compatibility.
> > But maybe you could find a simple heuristic that would decide what 
> > base-suffix
> > to set in minibuffer-completion-help?  Then no API changes will be needed.
> 
> Thank you for the guidance and suggestion.
> 
> Here's one heuristic which works decently well:

If this is for master, I'm fine with such changes.  But if you intend
to request installing this on emacs-29, then I will object making
non-trivial changes in any code that is not specific to the M-<UP> and
M-<DOWN> bindings that are new in Emacs 29.  I don't want to risk any
regressions in general-purpose completion code at this late stage.

Thanks.