fix spelling in core libraries

sdk/lib/isolate/isolate.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.
 
 /**
  * Concurrent programming using _isolates_:
  * independent workers that are similar to threads
  * but don't share memory,
  * communicating only via messages.
  *
@@ skipping 62 matching lines @@
 
   /**
    * Control port used to send control messages to the isolate.
    *
    * The control port identifies the isolate.
    *
    * An `Isolate` object allows sending control messages
    * through the control port.
    *
    * Some control messages require a specific capability to be passed along
-   * with the message (see [pauseCapability] and [terminateCapaibility]),
+   * with the message (see [pauseCapability] and [terminateCapability]),
    * otherwise the message is ignored by the isolate.
    */
   final SendPort controlPort;
 
   /**
    * Capability granting the ability to pause the isolate.
    *
    * This capability is required by [pause].
    * If the capability is `null`, or if it is not the correct pause capability
    * of the isolate identified by [controlPort],
@@ skipping 614 matching lines @@
  * as the original error, but has no other features of the original error.
  */
 class RemoteError implements Error {
   final String _description;
   final StackTrace stackTrace;
   RemoteError(String description, String stackDescription)
       : _description = description,
         stackTrace = new StackTrace.fromString(stackDescription);
   String toString() => _description;
 }