--- a/src/HOL/Library/Boolean_Algebra.thy Sun Nov 02 17:16:01 2014 +0100
+++ b/src/HOL/Library/Boolean_Algebra.thy Sun Nov 02 17:20:45 2014 +0100
@@ -2,7 +2,7 @@
Author: Brian Huffman
*)
-header {* Boolean Algebras *}
+section {* Boolean Algebras *}
theory Boolean_Algebra
imports Main