Spelling fixes e to i.

runtime/lib/timer_impl.dart

 // 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.
 
 import 'dart:_internal' hide Symbol;
 
 // Timer heap implemented as a array-based binary heap[0].
 // This allows for O(1) `first`, O(log(n)) `remove`/`removeFirst` and O(log(n))
 // `add`.
 //
@@ skipping 226 matching lines @@
       // Every zero timer gets its own event.
       _notifyZeroHandler();
     } else {
       _heap.add(this);
       if (_heap.isFirst(this)) {
         _notifyEventHandler();
       }
     }
   }
 
-  // Enqeue one message for each zero timer. To be able to distinguish from
+  // Enqueue one message for each zero timer. To be able to distinguish from
   // EventHandler messages we send a _ZERO_EVENT instead of a _TIMEOUT_EVENT.
   static void _notifyZeroHandler() {
     if (_sendPort == null) {
       _createTimerHandler();
     }
     _sendPort.send(_ZERO_EVENT);
   }
 
   // Handle the notification of a zero timer. Make sure to also execute non-zero
   // timers with a lower expiration time.
@@ skipping 178 matching lines @@
     if (repeating) {
       return new _Timer.periodic(milliSeconds, callback);
     }
     return new _Timer(milliSeconds, callback);
   }
 }
 
 _setupHooks() {
   VMLibraryHooks.timerFactory = _Timer._factory;
 }