Update runtime files
diff --git a/runtime/doc/windows.txt b/runtime/doc/windows.txt
index d999962..0c37cf5 100644
--- a/runtime/doc/windows.txt
+++ b/runtime/doc/windows.txt
@@ -1,4 +1,4 @@
-*windows.txt*   For Vim version 8.1.  Last change: 2019 Aug 18
+*windows.txt*   For Vim version 8.1.  Last change: 2019 Oct 18
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -312,6 +312,9 @@
 		    :+quit  " quit the next window
 		    :+2quit " quit the second next window
 <
+		When closing a help window, Vim will try to restore the
+		previous window layout |:helpclose|.
+
 :q[uit]!
 :{count}q[uit]!
 		Without {count}: Quit the current window.  If {count} is