Update runtime files.
diff --git a/runtime/doc/usr_40.txt b/runtime/doc/usr_40.txt
index 3456a76..21c09b4 100644
--- a/runtime/doc/usr_40.txt
+++ b/runtime/doc/usr_40.txt
@@ -1,4 +1,4 @@
-*usr_40.txt*	For Vim version 8.2.  Last change: 2020 Jul 28
+*usr_40.txt*	For Vim version 8.2.  Last change: 2020 Sep 02
 
 		     VIM USER MANUAL - by Bram Moolenaar
 
@@ -453,15 +453,15 @@
 performs the ":write".
    The general form of the :autocmd command is as follows: >
 
-	:autocmd [group] {events} {file-pattern} [nested] {command}
+	:autocmd [group] {events} {file-pattern} [++nested] {command}
 
 The [group] name is optional.  It is used in managing and calling the commands
 (more on this later).  The {events} parameter is a list of events (comma
 separated) that trigger the command.
    {file-pattern} is a filename, usually with wildcards.  For example, using
 "*.txt" makes the autocommand be used for all files whose name end in ".txt".
-The optional [nested] flag allows for nesting of autocommands (see below), and
-finally, {command} is the command to be executed.
+The optional [++nested] flag allows for nesting of autocommands (see below),
+and finally, {command} is the command to be executed.
 
 
 EVENTS
@@ -578,7 +578,7 @@
 event, it will not trigger the autocommands that would set the syntax, for
 example.  To make the events triggered, add the "nested" argument: >
 
-	:autocmd FileChangedShell * nested  edit
+	:autocmd FileChangedShell * ++nested  edit
 
 
 EXECUTING AUTOCOMMANDS