bug#52158: 29.0.50; Add key binding fo vc-git-stash

[Robert Pluim]

>>>>> On Tue, 07 Dec 2021 08:07:12 +0100, Lars Ingebrigtsen <larsi@gnus.org> 
>>>>> said:

    Lars> Robert Pluim <rpluim@gmail.com> writes:
    >> BTW, the stash area bindings are all upper case, and the new ones are
    >> lower case. Can we make them more consistent?

    Lars> Sure.  Feel free to adjust as you wish.  (Or, rather, as Dmitry 
wishes,
    Lars> I guess. 😀)

Well, I could say "damn backwards compatibility" and just move your
new bindings to upper case, since they've existed for all of 2 days,
or I could boldly trample over the vc-dir map and add lower case
versions of the stash area ones. Or I could say "itʼs a prefix map,
and itʼs consistent with magit, and who uses their <shift> key these
days anyways".

Iʼm getting a strong "do nothing" feeling for the outcome here. 🙂 

Robert
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