diff -r c421cfe2eada -r abe92b33ac9f src/HOL/Tools/Function/measure_functions.ML
--- a/src/HOL/Tools/Function/measure_functions.ML	Fri Aug 27 10:57:32 2010 +0200
+++ b/src/HOL/Tools/Function/measure_functions.ML	Fri Aug 27 12:57:55 2010 +0200
@@ -20,7 +20,7 @@
 (
   val name = "measure_function"
   val description =
-    "Rules that guide the heuristic generation of measure functions"
+    "rules that guide the heuristic generation of measure functions"
 );
 
 fun mk_is_measure t =