bug#62279: Add an option to restore C-h b "Prefix Command" output

[Bob Rogers]

Tags: patch

   Pursuant to the 'No more "Prefix Command" in C-h m' discussion in the
emacs-devel list.

                                        -- Bob Rogers
                                           http://www.rgrjr.com/

In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
 3.24.34, cairo version 1.16.0) of 2023-03-13 built on orion
Repository revision: a79d209748857c7d63ac48a7172a89e5ad1e752b
Repository branch: rgr-smtpmail-env-from
Windowing system distributor 'The X.Org Foundation', version 11.0.12003000
System Description: openSUSE Leap 15.4

Configured using:
 'configure --with-dbus=no --with-gsettings=no --with-gif=ifavailable
 --with-tiff=no --with-gnutls=yes --with-gconf=no'

describe-bindings-show-prefixes-2.patch
Description: Text Data