diff -r a273bdac0934 -r 8b5f00202e1a src/HOL/MicroJava/BV/Altern.thy
--- a/src/HOL/MicroJava/BV/Altern.thy	Wed Oct 07 19:45:00 2015 +0200
+++ b/src/HOL/MicroJava/BV/Altern.thy	Wed Oct 07 23:28:49 2015 +0200
@@ -2,7 +2,7 @@
     Author:     Martin Strecker
 *)
 
-section {* Alternative definition of well-typing of bytecode,  used in compiler type correctness proof *}
+section \<open>Alternative definition of well-typing of bytecode,  used in compiler type correctness proof\<close>
 
 theory Altern
 imports BVSpec