Comment and white-space cleanup in IO libraries.

runtime/bin/process_impl.dart

 // Copyright (c) 2011, 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.
 
 class _ProcessStartStatus {
   int _errorCode;  // Set to OS error code if process start failed.
   String _errorMessage;  // Set to OS error message if process start failed.
 }
 
 
 class _Process implements Process {
 
-  _Process.start(String path, 
-                 List<String> arguments, 
+  _Process.start(String path,
+                 List<String> arguments,
                  [String workingDirectory]) {
     if (path is !String) {
       throw new ProcessException("Path is not a String: $path");
     }
     _path = path;
 
     if (arguments is !List) {
       throw new ProcessException("Arguments is not a List: $arguments");
     }
     int len = arguments.length;
@@ skipping 27 matching lines @@
 
   int _intFromBytes(List<int> bytes, int offset) {
     return (bytes[offset] +
             (bytes[offset + 1] << 8) +
             (bytes[offset + 2] << 16) +
             (bytes[offset + 3] << 24));
   }
 
   void start() {
     var status = new _ProcessStartStatus();
-    bool success = _start(_path, 
-                          _arguments, 
-                          _workingDirectory, 
-                          _in, 
-                          _out, 
-                          _err, 
-                          _exitHandler, 
+    bool success = _start(_path,
+                          _arguments,
+                          _workingDirectory,
+                          _in,
+                          _out,
+                          _err,
+                          _exitHandler,
                           status);
     if (!success) {
       close();
       if (_errorHandler !== null) {
         _errorHandler(new ProcessException(status._errorMessage,
                                            status._errorCode));
         return;
       }
     }
     _started = true;
@@ skipping 131 matching lines @@
   Socket _err;
   Socket _exitHandler;
   int _pid;
   bool _closed;
   bool _killed;
   bool _started;
   Function _exitHandlerCallback;
   Function _errorHandler;
   Function _startHandler;
 }