diff -r 1f2788fb0b8b -r f1599e98c4d0 src/HOL/HOLCF/IOA/meta_theory/Simulations.thy
--- a/src/HOL/HOLCF/IOA/meta_theory/Simulations.thy	Wed Dec 30 21:56:12 2015 +0100
+++ b/src/HOL/HOLCF/IOA/meta_theory/Simulations.thy	Wed Dec 30 21:57:52 2015 +0100
@@ -2,7 +2,7 @@
     Author:     Olaf Müller
 *)
 
-section {* Simulations in HOLCF/IOA *}
+section \<open>Simulations in HOLCF/IOA\<close>
 
 theory Simulations
 imports RefCorrectness