diff -r 9537bf1c4853 -r 5b7a9633cfa8 src/HOL/Decision_Procs/ex/Commutative_Ring_Ex.thy
--- a/src/HOL/Decision_Procs/ex/Commutative_Ring_Ex.thy	Sun Nov 02 18:21:14 2014 +0100
+++ b/src/HOL/Decision_Procs/ex/Commutative_Ring_Ex.thy	Sun Nov 02 18:21:45 2014 +0100
@@ -1,6 +1,6 @@
 (*  Author:     Bernhard Haeupler *)
 
-header {* Some examples demonstrating the comm-ring method *}
+section {* Some examples demonstrating the comm-ring method *}
 
 theory Commutative_Ring_Ex
 imports "../Commutative_Ring"