src/HOL/ex/Commands.thy

--- a/src/HOL/ex/Commands.thy	Mon Nov 27 11:40:41 2017 +0100
+++ b/src/HOL/ex/Commands.thy	Mon Nov 27 11:45:20 2017 +0100
@@ -20,7 +20,8 @@
       let
         val ctxt = Toplevel.context_of st;
         val t = Syntax.read_term ctxt s;
-      in Pretty.writeln (Syntax.pretty_term ctxt t) end)));
+        val ctxt' = Variable.auto_fixes t ctxt;
+      in Pretty.writeln (Syntax.pretty_term ctxt' t) end)));
 \<close>
 
 print_test x