bug#43322: Confusing menu entry for cua-mode

[Stefan Kangas]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Stefan Kangas <stefan@marxist.se>
>> Date: Thu, 10 Sep 2020 17:41:13 -0700
>>
>> The menu item for cua-mode is, I claim unhelpfully, called "Shift
>> movement mark region (CUA)".  I am unable to parse what this even means
>> -- I thought it was about C-x and C-v, etc.?
>
> This doesn't appear by default, so the problem is not an acute one.
>
> I think there's a typo there: it should say
>
>   Shift movement marks the region (CUA)

Ah, right, it's only enabled if cua-enable-cua-keys is nil...

    (bindings--define-key menu [cua-emulation-mode]
      (menu-bar-make-mm-toggle
       cua-mode
       "Shift movement mark region (CUA)"
       "Use shifted movement keys to set and extend the region"
       (:visible (and (boundp 'cua-enable-cua-keys)
                      (not cua-enable-cua-keys)))))

But even fixing the typo here seems like it produce the incorrect
result, because AFAICT the region is already extended using <S-left> in
"emacs -Q"?