sort objects by class before positioning

since we don’t have pages yet, but want consistent layout

lib/parfait/integer.rb

@@ -27,6 +27,9 @@ module Parfait
       type_length
     end
 
+    def to_s
+      "Integer #{@value}"
+    end
     # compile time method to set the actual value.
     # this should not really be part of parfait, as ints are immutable at runtime.
     def set_value(value)