Update: original document autocmd.txt

Author: tomato3713

en/autocmd.txt

@@ -345,7 +345,7 @@ Name			triggered by ~
 			when popup menu is not visible
 |TextChangedP|		after a change was made to the text in Insert mode
 			when popup menu visible
-|TextYankPost|		after text is yanked or deleted
+|TextYankPost|		after text has been yanked or deleted
 
 |ColorSchemePre|	before loading a color scheme
 |ColorScheme|		after loading a color scheme
@@ -656,12 +656,17 @@ FileChangedRO			Before making the first change to a read-only
 							*E881*
 				If the number of lines changes saving for undo
 				may fail and the change will be aborted.
+							*DiffUpdated*
+DiffUpdated			After diffs have been updated.  Depending on
+				what kind of diff is being used (internal or
+				external) this can be triggered on every
+				change or when doing |:diffupdate|.
 							*DirChanged*
 DirChanged			The working directory has changed in response
 				to the |:cd| or |:lcd| commands, or as a
 				result of the 'autochdir' option.
 				The pattern can be:
-					"window" to trigger on `:lcd
+					"window" to trigger on `:lcd`
 					"global" to trigger on `:cd`
 					"auto"   to trigger on 'autochdir'.
 					"drop"	 to trigger on editing a file