diff -r 9537bf1c4853 -r 5b7a9633cfa8 src/HOL/Topological_Spaces.thy
--- a/src/HOL/Topological_Spaces.thy	Sun Nov 02 18:21:14 2014 +0100
+++ b/src/HOL/Topological_Spaces.thy	Sun Nov 02 18:21:45 2014 +0100
@@ -3,7 +3,7 @@
     Author:     Johannes Hölzl
 *)
 
-header {* Topological Spaces *}
+section {* Topological Spaces *}
 
 theory Topological_Spaces
 imports Main Conditionally_Complete_Lattices