anchor.diff:  		{halt, Req2, HandlerState} ->
   			terminate(Req2, State#state{handler_state=HandlerState});
   		{CTA, Req2, HandlerState} ->
  -		    CTA2 = [normalize_content_types(P) || P <- CTA],
  +			CTA2 = [normalize_content_types(P) || P <- CTA],
   			State2 = State#state{handler_state=HandlerState},
   			case cowboy_req:parse_header(<<"content-type">>, Req2) of
   				{ok, ContentType, Req3} ->
  
positive.code: 		{[], Req2, HandlerState} ->
  			not_acceptable(Req2, State#state{handler_state=HandlerState});
  		{CTP, Req2, HandlerState} ->
  		    CTP2 = [normalize_content_types(P) || P <- CTP],
  			State2 = State#state{
  				handler_state=HandlerState, content_types_p=CTP2},
  			case cowboy_req:parse_header(<<"accept">>, Req2) of
  
negative.code: 
  normalize_content_types({ContentType, Callback})
  		when is_binary(ContentType) ->
  	{cowboy_http:content_type(ContentType), Callback};
  normalize_content_types(Normalized) ->
  	Normalized.
  
  