bug#37769: global-set-key wrongly downcases the typed key (e.g. S-tab).

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: acm@muc.de,  37769@debbugs.gnu.org
> Date: Sat, 19 Oct 2019 10:02:15 +0200
> 
> The complaint is that the interactive spec of global-set-key downcases
> whatever the user enters.
> 
> M-x global-set-key RET C-S-o
> 
> will bind C-o, not C-S-o.  (Well, the case in question was about TAB,
> aka C-i, but...)  This is surprising, and should be fixed, I think (and
> the patch suggested fixes this).
> 
> I entered the discussion because I thought that this would be a bad
> change on ttys, because Emacs would then go ahead and bind the `C-S-o'
> key -- which then couldn't be used by the user, because there's no way
> to use shifted control keys under a tty.  At least I don't think so?
> 
> If this is the case, I think the original patch should be applied, but
> if we're running in an environment where `C-S-o' can't be entered (i.e.,
> not on a gui), then the command should error out or give a warning, at
> least.

Ah, okay.  Yes, I think Alan's change should be installed, but FWIW I
don't see a need for any warning (and we will have hard time knowing
when to show it, given the different capabilities of different
terminal emulators).

Thanks.