tuned comment

--- a/src/HOL/Induct/Tree.thy	Tue Mar 02 09:05:50 2010 +0100
+++ b/src/HOL/Induct/Tree.thy	Mon Mar 01 18:49:55 2010 +0100
@@ -68,7 +68,7 @@
 
 subsection{*A WF Ordering for The Brouwer ordinals (Michael Compton)*}
 
-text{*To define recdef style functions we need an ordering on the Brouwer
+text{*To use the function package we need an ordering on the Brouwer
   ordinals.  Start with a predecessor relation and form its transitive 
   closure. *}