--- a/src/HOL/Lattices.thy Sun Nov 02 18:21:14 2014 +0100
+++ b/src/HOL/Lattices.thy Sun Nov 02 18:21:45 2014 +0100
@@ -2,7 +2,7 @@
Author: Tobias Nipkow
*)
-header {* Abstract lattices *}
+section {* Abstract lattices *}
theory Lattices
imports Groups