Error handling and code cleanup

pkg/analysis_server/lib/src/channel.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library channel;
 
 import 'dart:convert';
 import 'dart:io';
 
 import 'package:analysis_server/src/protocol.dart';
@@ skipping 33 matching lines @@
    */
   final WebSocket socket;
 
   /**
    * Initialize a newly create [WebSocket] wrapper to wrap the given [socket].
    */
   WebSocketChannel(this.socket);
 
   @override
   void listen(void onRequest(Request request), {void onError(), void onDone()}) {
-    socket.listen((data) => _readRequest(data, onRequest), onError: onError, onDone: onDone);
+    socket.listen((data) =>
+        _readRequest(data, onRequest), onError: onError, onDone: onDone);
   }
 
   @override
   void sendNotification(Notification notification) {
     JsonEncoder encoder = const JsonEncoder(null);
     socket.add(encoder.convert(notification.toJson()));
   }
 
   @override
   void sendResponse(Response response) {
@@ skipping 15 matching lines @@
       // structure as a request.
       Request request = new Request.fromString(data);
       if (request == null) {
         sendResponse(new Response.invalidRequestFormat());
         return;
       }
       onRequest(request);
     }
   }
 }