fix all instances of "the the"

sdk/lib/async/stream.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.
 
 part of dart.async;
 
 // -------------------------------------------------------------------
 // Core Stream types
 // -------------------------------------------------------------------
 
@@ skipping 485 matching lines @@
   }
 
   /**
    * Creates a wrapper Stream that intercepts some errors from this stream.
    *
    * If this stream sends an error that matches [test], then it is intercepted
    * by the [handle] function.
    *
    * The [onError] callback must be of type `void onError(error)` or
    * `void onError(error, StackTrace stackTrace)`. Depending on the function
-   * type the the stream either invokes [onError] with or without a stack
+   * type the stream either invokes [onError] with or without a stack
    * trace. The stack trace argument might be `null` if the stream itself
    * received an error without stack trace.
    *
    * An asynchronous error [:e:] is matched by a test function if [:test(e):]
    * returns true. If [test] is omitted, every error is considered matching.
    *
    * If the error is intercepted, the [handle] function can decide what to do
    * with it. It can throw if it wants to raise a new (or the same) error,
    * or simply return to make the stream forget the error.
    *
@@ skipping 1294 matching lines @@
 class _ControllerEventSinkWrapper<T> implements EventSink<T> {
   EventSink _sink;
   _ControllerEventSinkWrapper(this._sink);
 
   void add(T data) { _sink.add(data); }
   void addError(error, [StackTrace stackTrace]) {
     _sink.addError(error, stackTrace);
   }
   void close() { _sink.close(); }
 }