anchor.diff:  is_json_body(_Hdrs, <<>>) -> false;
   is_json_body(Hdrs, _Body) ->
     ContentType = proplists:get_value("Content-Type", Hdrs, ""),
  -  case string:str(ContentType, "json") of
  +  case string:str(unicode:characters_to_list(ContentType), "json") of
       0 -> false;
       _ -> true
     end.
  
positive.code:               , proplists:get_value(host, Params, "localhost")
                , ":"
                , integer_to_list(proplists:get_value(port, Params, DefaultPort))
                , proplists:get_value(path, Params, Path)
                ], "").
  
  make_request( #katt_request{headers=Hdrs0, url=Url0, body=RawBody0} = Req
  
negative.code: -include("blueprint_types.hrl").
  
  %%%_* Defines ==========================================================
  -define(TABLE,             ?MODULE).
  -define(VAR_PREFIX,        "katt_").
  -define(RECALL_BEGIN_TAG,  "{{<").
  -define(RECALL_END_TAG,    "}}").
  