[Modify] Polish it

websocket-sharp/Net/HttpListenerRequest.cs

@@ -899,8 +899,12 @@ namespace WebSocketSharp.Net
     public override string ToString ()
     {
       var buff = new StringBuilder (64);
-      buff.AppendFormat ("{0} {1} HTTP/{2}\r\n", _httpMethod, _rawUrl, _protocolVersion);
+
-      buff.Append (_headers.ToString ());
+      buff
+      .AppendFormat (
+        "{0} {1} HTTP/{2}\r\n", _httpMethod, _rawUrl, _protocolVersion
+      )
+      .Append (_headers.ToString ());
 
       return buff.ToString ();
     }