  ########## Request Mixin ##########
  
  class RequestMixin(object):
      """
      Mixin class to provide request parsing behaviour.
      """
  
      USE_FORM_OVERLOADING = True
      METHOD_PARAM = "_method"
      CONTENTTYPE_PARAM = "_content_type"
 
</s> remove     """An HttpResponse that may include content that hasn't yet been serialized."""
 </s> add     """
    An HttpResponse that may include content that hasn't yet been serialized.
    """
 </s> remove         """Return reason text corresponding to our HTTP response status code.
        Provided for convenience."""
 </s> add         """
        Return reason text corresponding to our HTTP response status code.
        Provided for convenience.
        """ </s> remove         provide a form that can be used to submit arbitrary content."""
 </s> add         provide a form that can be used to submit arbitrary content.
        """ </s> remove     """An exception representing an HttpResponse that should be returned immediately."""
 </s> add     """
    An exception representing an Response that should be returned immediately.
    Any content should be serialized as-is, without being filtered.
    """
 </s> remove                 #
                # UPDATE: http://code.djangoproject.com/ticket/15785
 </s> add 
    Mixin class to provide request parsing behavior.
  ########## Request Mixin ##########
  
  class RequestMixin(object):
      """
    Mixin class to provide request parsing behavior.
      """
  
      USE_FORM_OVERLOADING = True
      METHOD_PARAM = "_method"
      CONTENTTYPE_PARAM = "_content_type"
keep keep keep keep replace keep keep keep keep keep
 More tests, getting new serialization into resource 
djangorestframework/mixins.py