add literalinclude for curlrequest -> debug

user_guide_src/source/libraries/curlrequest.rst

@@ -219,7 +219,7 @@ script execution. This is done by passing CURLOPT_VERBOSE and echoing the output
 server via ``spark serve`` you will see the output in the console. Otherwise, the output will be written to
 the server's error log.
 
-    $response->request('GET', 'http://example.com', ['debug' => true]);
+.. literalinclude:: curlrequest/034.php
 
 You can pass a filename as the value for debug to have the output written to a file:
 

user_guide_src/source/libraries/curlrequest/034.php

@@ -0,0 +1,3 @@
+<?php
+
+$response->request('GET', 'http://example.com', ['debug' => true]);