diff --git a/runtime/doc/usr_20.txt b/runtime/doc/usr_20.txt
index ebad3c5..a94195d 100644
--- a/runtime/doc/usr_20.txt
+++ b/runtime/doc/usr_20.txt
@@ -1,4 +1,4 @@
-*usr_20.txt*	For Vim version 8.2.  Last change: 2006 Apr 24
+*usr_20.txt*	For Vim version 8.2.  Last change: 2021 Nov 13
 
 		     VIM USER MANUAL - by Bram Moolenaar
 
@@ -289,11 +289,11 @@
 use the <Up> key to recall an older command line.  <Down> then takes you back
 to newer commands.
 
-There are actually four histories.  The ones we will mention here are for ":"
+There are actually five histories.  The ones we will mention here are for ":"
 commands and for "/" and "?" search commands.  The "/" and "?" commands share
-the same history, because they are both search commands.  The two other
-histories are for expressions and input lines for the input() function.
-|cmdline-history|
+the same history, because they are both search commands.  The three other
+histories are for expressions, debug more commands and input lines for the
+input() function.  |cmdline-history|
 
 Suppose you have done a ":set" command, typed ten more colon commands and then
 want to repeat that ":set" command again.  You could press ":" and then ten