Fix subscription handling in stream decoder

sdk/lib/io/file_impl.dart

-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2013, 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.
 
 part of dart.io;
 
 
 class _FileStream extends Stream<List<int>> {
   // Stream controller.
   StreamController<List<int>> _controller;
 
@@ skipping 506 matching lines @@
   String readAsStringSync([Encoding encoding = Encoding.UTF_8]) {
     List<int> bytes = readAsBytesSync();
     return _decodeString(bytes, encoding);
   }
 
   static List<String> _decodeLines(List<int> bytes, Encoding encoding) {
     if (bytes.length == 0) return [];
     var list = [];
     var controller = new StreamController();
     controller.stream
-      .transform(new StringDecoder(encoding))
-      .transform(new LineTransformer())
-      .listen((line) => list.add(line));
+        .transform(new StringDecoder(encoding))
+        .transform(new LineTransformer())
+        .listen((line) => list.add(line));
     controller.add(bytes);
     controller.close();
     return list;
   }
 
   Future<List<String>> readAsLines([Encoding encoding = Encoding.UTF_8]) {
     _ensureFileService();
     Completer<List<String>> completer = new Completer<List<String>>();
     return readAsBytes().then((bytes) {
       return _decodeLines(bytes, encoding);
@@ skipping 508 matching lines @@
           new FileIOException("File closed '$_name'"));
     });
     return completer.future;
   }
 
   final String _name;
   int _id;
 
   SendPort _fileService;
 }