webcommands: fix description of manifest default behavior stable

webcommands: fix description of manifest default behavior

--- a/mercurial/hgweb/webcommands.py	Mon Apr 27 19:09:54 2015 -0300
+++ b/mercurial/hgweb/webcommands.py	Mon Apr 27 19:13:55 2015 -0300
@@ -459,7 +459,7 @@
 
     Show information about a directory.
 
-    If the URL path arguments are defined, information about the root
+    If the URL path arguments are omitted, information about the root
     directory for the ``tip`` changeset will be shown.
 
     Because this handler can only show information for directories, it