Patch for emacs/basic.texi

[Richard Stallman <rms@gnu.org>]

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Would someone please install this and ack?
The log entry can be

Document the easiest way to type the undo key.


diff --git a/doc/emacs/basic.texi b/doc/emacs/basic.texi
index abb385f53d..2372ce972d 100644
--- a/doc/emacs/basic.texi
+++ b/doc/emacs/basic.texi
@@ -461,6 +461,11 @@ Normally, this command undoes the last change, moving point back to
 where it was before the change.  The undo command applies only to
 changes in the buffer; you can't use it to undo cursor motion.
 
+  On a graphics terminal, the easiest way to invoke @code{undo} is
+with @kbd{C-/}; that doesn't need the shift key.  On a text terminal,
+@kbd{C-/} does not exist, but usually you can type @kbd{C-_} without
+the shift key and it will work anyway.
+
   Although each editing command usually makes a separate entry in the
 undo records, very simple commands may be grouped together.
 Sometimes, an entry may cover just part of a complex command.

-- 
Dr Richard Stallman
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)