fix all instances of "the the"

sdk/lib/mirrors/mirrors.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.
 
 // For the purposes of the mirrors library, we adopt a naming
 // convention with respect to getters and setters.  Specifically, for
 // some variable or field...
 //
 //   var myField;
 //
@@ skipping 207 matching lines @@
   bool operator == (other);
 }
 
 /**
  * A [DeclarationMirror] reflects some entity declared in a Dart program.
  */
 abstract class DeclarationMirror implements Mirror {
   /**
    * The simple name for this Dart language entity.
    *
-   * The simple name is in most cases the the identifier name of the entity,
+   * The simple name is in most cases the identifier name of the entity,
    * such as 'myMethod' for a method, [:void myMethod() {...}:] or 'mylibrary'
    * for a [:library 'mylibrary';:] declaration.
    */
   Symbol get simpleName;
 
   /**
    * The fully-qualified name for this Dart language entity.
    *
    * This name is qualified by the name of the owner. For instance,
    * the qualified name of a method 'method' in class 'Class' in
@@ skipping 1202 matching lines @@
   final override;
 
   /**
    * See the documentation for [MirrorsUsed.symbols], [MirrorsUsed.targets], 
    * [MirrorsUsed.metaTargets] and [MirrorsUsed.override] for documentation 
    * of the parameters.
    */
   const MirrorsUsed(
       {this.symbols, this.targets, this.metaTargets, this.override});
 }