to_s for parfait list

lib/parfait/list.rb

@@ -253,6 +253,15 @@ module Parfait
       list
     end
 
+    def to_s
+      res = "["
+      each do |item|
+        res = res + item.to_s
+        res = res + " ,"
+      end
+      res = res + " ]"
+      return res
+    end
     def to_a
       array = []
       index = 0

lib/parfait/type.rb

@@ -153,7 +153,7 @@ module Parfait
 
     # resolve according to normal oo logic, ie look up in superclass if not present
     # NOTE: this will probably not work in future as the code for the superclass
-    # method, being bound to t adifferent type, will assume that types (not the run-time
+    # method, being bound to a different type, will assume that types (not the run-time
     # actual types) layout. Either need to enforce some c++ style upwards compatibility (buuh)
     # or copy the methods and recompile them for the actual type. (maybe still later dynamically)
     # But for now we walk up, as it should really just be to object

test/parfait/test_list1.rb

@@ -70,6 +70,9 @@ module Parfait
       end
       assert_equal 2 , counter
     end
+    def test_to_s
+      assert_equal "[one ,two ,three , ]" , @list.to_s
+    end
     def test_to_a
       arr = @list.to_a
       assert_equal Array , arr.class