bug#46610: Interactive mode tagging for python.el navigation functions

[Dmitry Gutov]

On 18.02.2021 21:47, Eli Zaretskii wrote:
> > Cc: ddavis@ddavis.io, larsi@gnus.org, 46610@debbugs.gnu.org,
> >   monnier@iro.umontreal.ca
> > From: Dmitry Gutov <dgutov@yandex.ru>
> > Date: Thu, 18 Feb 2021 19:54:06 +0200
> >
> > > My question is more of the conceptual kind, not necessarily about this
> > > specific change.  Your original response was also about the principle,
> > > AFAIU.
> >
> > I guess I'm not sure what you are asking about at this point
>
> Let me repeat my original question:

Very good.

> > So packages on ELPA are allowed to be ahead of those in core, but not
> > vice versa?  Is that really the intent that we allow them to diverge,
> > but only in one direction?
>
> > yes, python.el is allowed to incorporate support for some new
> > features from Emacs 28, as long as they are backward-compatible, or
> > gated behind a version check.
>
> If python.el in emacs.git is allowed to be different from that in
> elpa.git (and AFAIU we already allow that), then there should be no
> need for any compatibility shims in the version that is in emacs.git.

Then this part of my first reply should be most pertinent:

    Then we (someone? who?) either have to maintain both versions

Emphasis on "who".