anchor.diff:  	{HeadersBlock, _} = cow_hpack:encode([
   		{<<":scheme">>, <<"http">>},
   		{<<":authority">>, <<"localhost">>}, %% @todo Correct port number.
  -		{<<":path">>, <<>>}
  +		{<<":path">>, <<"/">>}
   	]),
   	ok = gen_tcp:send(Socket, cow_http2:headers(1, fin, HeadersBlock)),
   	%% Receive a PROTOCOL_ERROR stream error.
  
positive.code: 	{HeadersBlock, _} = cow_hpack:encode([
  		{<<":method">>, <<"GET">>},
  		{<<":scheme">>, <<"http">>},
  		{<<":path">>, <<>>}
  	]),
  	ok = gen_tcp:send(Socket, cow_http2:headers(1, fin, HeadersBlock)),
  	%% Receive a PROTOCOL_ERROR stream error.
  
negative.code: 	{HeadersBlock, _} = cow_hpack:encode([
  		{<<":method">>, <<"GET">>},
  		{<<":authority">>, <<"localhost">>}, %% @todo Correct port number.
  		{<<":path">>, <<"/">>}
  	]),
  	ok = gen_tcp:send(Socket, cow_http2:headers(1, fin, HeadersBlock)),
  	%% Receive a PROTOCOL_ERROR stream error.
  