Fix a number of editor errors and warnings in io tests

tests/standalone/src/io/Regress-1925.dart

 // Copyright (c) 2012, 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.
 //
 // Regression test for http://code.google.com/p/dart/issues/detail?id=1925.
 //
 // VMOptions=
 // VMOptions=--short_socket_read
 // VMOptions=--short_socket_write
 // VMOptions=--short_socket_read --short_socket_write
 
 #import("dart:io");
 #import("dart:isolate");
 #source("TestingServer.dart");
 
-final CONNECTIONS = 200;
-
 class Regress1925TestServer extends TestingServer {
 
   void onConnection(Socket socket) {
-    socket.onError = () => Expect.fail("Server socket error");
+    socket.onError = (e) => Expect.fail("Server socket error $e");
     socket.inputStream.onClosed = () => socket.outputStream.close();
     socket.inputStream.onData = () {
       var buffer = new List(1);
       var read = socket.inputStream.readInto(buffer);
       Expect.equals(1, read);
       socket.outputStream.writeFrom(buffer, 0, read);
     };
   }
 
   int _connections = 0;
 }
 
 
 class Regress1925Test extends TestingServerTest {
   Regress1925Test.start() : super.start(new Regress1925TestServer());
 
   void run() {
 
-    void onConnect() {
-      _connections++;
-      if (_connections == CONNECTIONS) {
-        for (int i = 0; i < CONNECTIONS; i++) {
-          _sockets[i].close();
-        }
-        shutdown();
-      }
-    }
-
     var count = 0;
     var buffer = new List(5);
     Socket socket = new Socket(TestingServer.HOST, _port);
     socket.onConnect = () {
       socket.outputStream.write("12345".charCodes());
       socket.outputStream.close();
       socket.inputStream.onData = () {
         count += socket.inputStream.readInto(buffer, count);
       };
       socket.inputStream.onClosed = () {
         Expect.equals(5, count);
         shutdown();
       };
-      socket.inputStream.onError = () => Expect.fail("Socket error");
+      socket.inputStream.onError = (e) => Expect.fail("Socket error $e");
     };
   }
 }
 
 main() {
   Regress1925Test test = new Regress1925Test.start();
 }