diff -r 9537bf1c4853 -r 5b7a9633cfa8 src/CCL/ex/List.thy
--- a/src/CCL/ex/List.thy	Sun Nov 02 18:21:14 2014 +0100
+++ b/src/CCL/ex/List.thy	Sun Nov 02 18:21:45 2014 +0100
@@ -3,7 +3,7 @@
     Copyright   1993  University of Cambridge
 *)
 
-header {* Programs defined over lists *}
+section {* Programs defined over lists *}
 
 theory List
 imports Nat