bug#51010: 29.0.50; python completion breaks upon non-trivial rl config

[Stefan Kangas]

close 51010 29.1
thanks

Carlos Pita <carlosjosepita@gmail.com> writes:

>>> Is this a recent problem, or did we always behave like that?
>
>> I hope that Carlos can answer your question.
>
> I'm pretty sure python.el has behaved the same for a long time in this
> regard, but readline has been gaining some nifty features over the
> years and so my .inputrc.

OK, let's play it safe and install it on master.  With python.el, we can
release an updated package on GNU ELPA, so it is not critical that this
is in Emacs 28.1.

Pushed to master (commit a0973fa7a6).