--- a/src/HOL/MicroJava/DFA/Opt.thy Wed Oct 07 19:45:00 2015 +0200
+++ b/src/HOL/MicroJava/DFA/Opt.thy Wed Oct 07 23:28:49 2015 +0200
@@ -3,7 +3,7 @@
Copyright 2000 TUM
*)
-section {* More about Options *}
+section \<open>More about Options\<close>
theory Opt
imports Err