Spelling fixes e to i.

sdk/lib/async/stream_impl.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.
 
 part of dart.async;
 
 /** Abstract and private interface for a place to put events. */
 abstract class _EventSink<T> {
   void _add(T data);
   void _addError(Object error, StackTrace stackTrace);
@@ skipping 61 matching lines @@
    * when `cancelOnError` is true.
    */
   static const int _STATE_CANCELED = 8;
   /**
    * Set when either:
    *
    *   * an error is sent, and [cancelOnError] is true, or
    *   * a done event is sent.
    *
    * If the subscription is canceled while _STATE_WAIT_FOR_CANCEL is set, the
-   * state is unset, and no furher events must be delivered.
+   * state is unset, and no further events must be delivered.
    */
   static const int _STATE_WAIT_FOR_CANCEL = 16;
   static const int _STATE_IN_CALLBACK = 32;
   static const int _STATE_HAS_PENDING = 64;
   static const int _STATE_PAUSE_COUNT = 128;
 
   /* Event handlers provided in constructor. */
   _DataHandler<T> _onData;
   Function _onError;
   _DoneHandler _onDone;
@@ skipping 949 matching lines @@
 
 /** An empty broadcast stream, sending a done event as soon as possible. */
 class _EmptyStream<T> extends Stream<T> {
   const _EmptyStream() : super._internal();
   bool get isBroadcast => true;
   StreamSubscription<T> listen(void onData(T data),
       {Function onError, void onDone(), bool cancelOnError}) {
     return new _DoneStreamSubscription<T>(onDone);
   }
 }