Reapply "Make Comparable generic."

sdk/lib/core/string.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.
 
 part of dart.core;
 
 /**
  * The String class represents sequences of characters. Strings are
  * immutable. A string is represented by a sequence of Unicode UTF-16
  * code units accessible through the [codeUnitAt] or the
  * [codeUnits] members. Their string representation is accessible through
  * the index-operator.
  *
  * The characters of a string are encoded in UTF-16. Decoding UTF-16, which
  * combines surrogate pairs, yields Unicode code points. Following a similar
  * terminology to Go we use the name "rune" for an integer representing a
  * Unicode code point. The runes of a string are accessible through the [runes]
  * getter.
  */
-abstract class String implements Comparable, Pattern {
+abstract class String implements Comparable<String>, Pattern {
   /**
    * Allocates a new String for the specified [charCodes].
    *
    * The [charCodes] can be UTF-16 code units or runes. If a char-code value is
    * 16-bit it is copied verbatim. If it is greater than 16 bits it is
    * decomposed into a surrogate pair.
    */
   external factory String.fromCharCodes(Iterable<int> charCodes);
 
   /**
@@ skipping 466 matching lines @@
  */
 class CodeUnits extends ListIterable<int> {
   /** The string that this is the code units of. */
   String string;
 
   CodeUnits(this.string);
 
   int get length => string.length;
   int elementAt(int i) => string.codeUnitAt(i);
 }