bug#50752: 28.0.50; easy-menu-define lowers the menu-bar key

[Lars Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

>> The following patch seems to do the trick, and should be conservative
>> enough for emacs-28, I think.
>
> I wouldn't start such experiments on the release branch.  It's not an
> urgent problem.

Yeah, it's pretty obscure.

> uniprop_table is somewhat expensive, and is definitely an overkill for
> converting pure ASCII characters.  Why not just set/reset the 0x20
> bit?

I thought it made sense to be conservative here and do it "properly",
instead of open-coding an A-Za-z upcase/downcase ourselves.  And doesn't
uniprop_table just return the table from char-code-property-alist here?
So it's an assq from a short list.

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