updated for version 7.4.449
Problem:    Can't easily close the help window. (Chris Gaal)
Solution:   Add ":helpclose". (Christian Brabandt)
diff --git a/runtime/doc/helphelp.txt b/runtime/doc/helphelp.txt
index 87f095e..e7d281a 100644
--- a/runtime/doc/helphelp.txt
+++ b/runtime/doc/helphelp.txt
@@ -96,6 +96,9 @@
 			find a tag in a file with the same language as the
 			current file.  See |help-translated|.
 
+						 	*:helpc* *:helpclose*
+:helpc[lose]            Close one help window.
+
 							*:helpg* *:helpgrep*
 :helpg[rep] {pattern}[@xx]
 			Search all help text files and make a list of lines