Date in iso8601 should just be a to_s alias

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@3952 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activesupport/lib/active_support/core_ext/date/conversions.rb

@@ -26,9 +26,7 @@ module ActiveSupport #:nodoc:
           ::Time.send(form, year, month, day)
         end
         
-        def xmlschema
-          to_time.xmlschema
-        end
+        alias :xmlschema :to_s
       end
     end
   end