Add missing comment marker

Author: zoffixznet

doc/Type/Hash.pod6

@@ -150,7 +150,7 @@ constraints with a where-clause.
     # OUTPUT:
     # 9001
     # Type check failed in binding assignval; expected Powerful but got Int (900)
-            in block <unit> at example.pl line 4
+    #       in block <unit> at example.pl line 4
 
 =head1 Looping over hash keys and values