--- a/src/HOL/ex/Iff_Oracle.thy Sun Nov 02 18:21:14 2014 +0100
+++ b/src/HOL/ex/Iff_Oracle.thy Sun Nov 02 18:21:45 2014 +0100
@@ -3,7 +3,7 @@
Author: Makarius
*)
-header {* Example of Declaring an Oracle *}
+section {* Example of Declaring an Oracle *}
theory Iff_Oracle
imports Main