anchor.diff:  
   -spec rfc1123() -> string().
   rfc1123() ->
  -    case ets:lookup(lala, rfc1123) of
  +    case ets:lookup(?MODULE, rfc1123) of
           [{rfc1123, Date}] ->
               Date;
           [] ->
  
positive.code: -spec handle_info(any(), State) -> {noreply, State} when State::#state{}.
  handle_info(update_date, State) ->
      Date = httpd_util:rfc1123_date(),
      ets:insert(lala, {rfc1123, Date}),
      {noreply, State};
  handle_info(_Info, State) ->
      {noreply, State}.
  
negative.code: 
  -spec init([]) -> {ok, #state{}}.
  init([]) ->
      ?MODULE = ets:new(?MODULE, [named_table, protected]),
      handle_info(update_date, #state{}),
      timer:send_interval(1000, update_date),
      {ok, #state{}}.
  