bug#66386: 28.2; RFE: Provide global key bindings for increasing/decreasing numbers at point

[Eli Zaretskii <eliz@gnu.org>]

> From: Tim Landscheidt <tim@tim-landscheidt.de>
> Date: Sat, 07 Oct 2023 10:57:34 +0000
> 
> Package: emacs
> Version: 28.2
> Severity: wishlist
> 
> When entering a number with read-number or skeleton-read or
> just editing text, it can be very useful to increase/de-
> crease the number at point.  For Org, Emacs ships the func-
> tions org-increase-number-at-point and
> org-decrease-number-at-point for this purpose and binds them
> to C-M-S-<right> and C-M-S-<left>, respectively, in
> org-mode-map.
> 
> It would be nice if these functions or some variant could be
> bound to global key bindings that are active by default in
> all modes.

These are trivial functions that everyone who needs them can easily
code, and bind to any keys they want.  For example, I'd prefer to bind
them to S-<kp-add> and S-<kp-subtract> instead.  Is it really
justified to have these in Emacs by default, let alone usurp some
global key bindings for them?  Why not keep them available only in
modes where they are really needed?