diff -r c8a2755bf220 -r ff784d5a5bfb src/HOL/NanoJava/Example.thy
--- a/src/HOL/NanoJava/Example.thy	Sat Jan 05 17:00:43 2019 +0100
+++ b/src/HOL/NanoJava/Example.thy	Sat Jan 05 17:24:33 2019 +0100
@@ -131,7 +131,7 @@
 apply  auto
 apply  (case_tac "aa=a")
 apply   auto
-apply (tactic "smp_tac @{context} 1 1")
+apply (tactic "smp_tac \<^context> 1 1")
 apply (case_tac "aa=a")
 apply  auto
 done