fix all instances of "the the"

pkg/analyzer/lib/src/generated/source.dart

 // Copyright (c) 2014, 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.
 
 library analyzer.src.generated.source;
 
 import 'dart:collection';
 import "dart:math" as math;
 
 import 'package:analyzer/file_system/file_system.dart';
@@ skipping 423 matching lines @@
  */
 abstract class Source implements AnalysisTarget {
   /**
    * An empty list of sources.
    */
   static const List<Source> EMPTY_LIST = const <Source>[];
 
   /**
    * Get the contents and timestamp of this source.
    *
-   * Clients should consider using the the method [AnalysisContext.getContents]
+   * Clients should consider using the method [AnalysisContext.getContents]
    * because contexts can have local overrides of the content of a source that the source is not
    * aware of.
    *
    * @return the contents and timestamp of the source
    * @throws Exception if the contents of this source could not be accessed
    */
   TimestampedData<String> get contents;
 
   /**
    * Return an encoded representation of this source that can be used to create a source that is
@@ skipping 30 matching lines @@
   bool get isInSystemLibrary;
 
   /**
    * Return the modification stamp for this source, or a negative value if the
    * source does not exist. A modification stamp is a non-negative integer with
    * the property that if the contents of the source have not been modified
    * since the last time the modification stamp was accessed then the same value
    * will be returned, but if the contents of the source have been modified one
    * or more times (even if the net change is zero) the stamps will be different.
    *
-   * Clients should consider using the the method
+   * Clients should consider using the method
    * [AnalysisContext.getModificationStamp] because contexts can have local
    * overrides of the content of a source that the source is not aware of.
    */
   int get modificationStamp;
 
   /**
    * Return a short version of the name that can be displayed to the user to denote this source. For
    * example, for a source representing a file this would typically be the name of the file.
    *
    * @return a name that can be displayed to the user to denote this source
@@ skipping 28 matching lines @@
    * @return `true` if the given object is a source that represents the same source code as
    *         this source
    * See [Object.==].
    */
   @override
   bool operator ==(Object object);
 
   /**
    * Return `true` if this source exists.
    *
-   * Clients should consider using the the method [AnalysisContext.exists] because
+   * Clients should consider using the method [AnalysisContext.exists] because
    * contexts can have local overrides of the content of a source that the source is not aware of
    * and a source with local content is considered to exist even if there is no file on disk.
    *
    * @return `true` if this source exists
    */
   bool exists();
 }
 
 /**
  * The interface `ContentReceiver` defines the behavior of objects that can receive the
@@ skipping 375 matching lines @@
   Source resolveAbsolute(Uri uri, [Uri actualUri]);
 
   /**
    * Return an absolute URI that represents the given [source], or `null` if a
    * valid URI cannot be computed.
    *
    * The computation should be based solely on [source.fullName].
    */
   Uri restoreAbsolute(Source source) => null;
 }