
diff -r 94d1f820130f -r 576fb8068ba6 src/HOL/MicroJava/BV/EffectMono.thy
--- a/src/HOL/MicroJava/BV/EffectMono.thy	Wed Jun 08 11:53:43 2016 +0200
+++ b/src/HOL/MicroJava/BV/EffectMono.thy	Wed Jun 08 18:45:44 2016 +0200
@@ -55,7 +55,7 @@
     fix b 
     assume "length (l # ls) = length (b::ty list)" 
     with Cons
-    show "?Q (l # ls) b" by - (cases b, auto)
+    show "?Q (l # ls) b" by (cases b) auto
   qed
 qed
  




