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

[Eli Zaretskii]

> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Thu, 18 Feb 2021 13:49:10 +0200
> Cc: 46610@debbugs.gnu.org
> 
> python.el is distributed as "core" package through GNU ELPA and declared 
> compatibility up to Emacs 24.1.
> 
> So I don't think you can use the new 'interactive' syntax there.

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?