bug#23247: 25.0.92: Documentation bug about Control modified key bindings

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Cc: Kaushal Modi <kaushal.modi@gmail.com>,  23247@debbugs.gnu.org
> Date: Sat, 12 Oct 2019 21:41:40 +0200
> 
> >> But I am able to bind something like
> >> 
> >> (global-set-key (kbd "C-S-n") #'previous-line)
> >> 
> >> and have C-n and "C-N" call different commands.
> >
> > Did you try that on a text terminal as well?
> >
> >> Does that piece of information about Control-modified alphabetical
> >> characters need correction or clarification?
> >
> > Not sure we want to enter these details in a user manual.  Also, "C-N"
> > and "C-S-n" are not the same thing in this context.
> 
> I think it would make sense to at least mention these wrinkles in the
> user manual -- many people don't care about running Emacs in a terminal,
> and being able to bind shifted alphabetical characters opens up a whole
> new range of user-definable keystrokes.

It's OK to mention that, but please also add a note that this only
works on GUI frames.