Document that one should not change the `state' entry in `org-log-note-headings'

lisp/ChangeLog

@@ -5,6 +5,8 @@
 	(org-outline-overlay-data, org-set-outline-overlay-data): New
 	functions.
 	(org-save-outline-visibility): New macro.
+	(org-log-note-headings): Document that one should not change the
+	`state' note format.
 
 2009-12-13  Carsten Dominik  <carsten.dominik@gmail.com>
 

lisp/org.el

@@ -2070,7 +2070,10 @@ empty string.
 %s will be replaced by the new TODO state, in double quotes.
 %S will be replaced by the old TODO state, in double quotes.
 %u will be replaced by the user name.
-%U will be replaced by the full user name."
+%U will be replaced by the full user name.
+
+In fact, it is not a good idea to change the `state' entry, because
+because agenda log mode depends on the format of these entries."
   :group  'org-todo
   :group  'org-progress
   :type '(list :greedy t