Migrated test block 28 to Dart 2.0.

tests/corelib_strong/string_replace_dollar_test.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.
-
-import "package:expect/expect.dart";
-
-main() {
-  String jsText = r"""'$'
-""";
-  String htmlStr = '%%DART';
-  String htmlOut = htmlStr.replaceAll("%%DART", jsText);
-  Expect.equals(jsText, htmlOut);
-  htmlOut = htmlStr.replaceFirst("%%DART", jsText);
-  Expect.equals(jsText, htmlOut);
-  htmlOut = htmlStr.replaceAll(new RegExp("%%DART"), jsText);
-  Expect.equals(jsText, htmlOut);
-  htmlOut = htmlStr.replaceFirst(new RegExp("%%DART"), jsText);
-  Expect.equals(jsText, htmlOut);
-
-  // Regression test, http://dartbug.com/17886
-  String doubleDollar = r"$'$`";
-  var string = r"flip-flip-flop";
-  var result = string.replaceFirst("flip", doubleDollar);
-  Expect.equals(r"$'$`-flip-flop", result);
-  result = string.replaceAll("flip", doubleDollar);
-  Expect.equals(r"$'$`-$'$`-flop", result);
-}