--- a/src/HOL/BNF_Examples/Misc_Datatype.thy Wed Sep 03 22:47:05 2014 +0200
+++ b/src/HOL/BNF_Examples/Misc_Datatype.thy Wed Sep 03 22:47:05 2014 +0200
@@ -237,26 +237,26 @@
instance kk1 and kk2 :: countable
by countable_datatype
-(* FIXME:
-
instance t1 and t2 and t3 :: countable
by countable_datatype
instance t1' and t2' and t3' :: countable
by countable_datatype
+(* FIXME:
+
instance k1 and k2 and k3 and k4 :: countable
by countable_datatype
instance tt1 and tt2 and tt3 and tt4 :: countable
by countable_datatype
+*)
instance d1 :: countable
by countable_datatype
instance d1' :: countable
by countable_datatype
-*)
instance d2 :: countable
by countable_datatype