Merge pull request #5675 from brcolow/vim-7.4.1738

vim-patch:7.4.17[35,38,39]

runtime/doc/message.txt

@@ -19,6 +19,15 @@ The ":messages" command can be used to view previously given messages.  This
 is especially useful when messages have been overwritten or truncated.  This
 depends on the 'shortmess' option.
 
+	:messages		Show all messages.
+
+	:{count}messages	Show the {count} most recent messages.
+
+	:messages clear		Clear all messages.
+
+	:{count}messages clear	Clear messages, keeping only the {count} most
+				recent ones.
+
 The number of remembered messages is fixed at 20 for the tiny version and 200
 for other versions.
 
@@ -58,9 +67,9 @@ If you are lazy, it also works without the shift key: >
 When an error message is displayed, but it is removed before you could read
 it, you can see it again with: >
   :echo errmsg
-or view a list of recent messages with: >
+Or view a list of recent messages with: >
   :messages
-
+See `:messages` above.
 
 LIST OF MESSAGES
 			*E222* *E228* *E232* *E256* *E293* *E298* *E304* *E317*