anchor.diff:  file_server(Config) ->
   	doc("File server example with directory listing."),
   	try
  -		do_compile_and_start(file_server),
  +		do_compile_and_start(file_server, Config),
   		do_file_server(tcp, http, Config),
   		do_file_server(tcp, http2, Config)
   	after
  
positive.code: 
  %% Websocket.
  
  websocket(_) ->
  	doc("Websocket example."),
  	try
  		do_compile_and_start(websocket),
  		%% We can only initiate a Websocket connection from HTTP/1.1.
  		{ok, Pid} = gun:open("127.0.0.1", 8080, #{protocols => [http], retry => 0}),
  		{ok, http} = gun:await_up(Pid),
  
negative.code: compress_response(Config) ->
  	doc("Compressed response example."),
  	try
  		do_compile_and_start(compress_response, Config),
  		do_compress_response(tcp, http, Config),
  		do_compress_response(tcp, http2, Config)
  	after
  