test rename overhaul: step 8 - language tests

tests/language/double_to_string_as_fixed_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.
 // Test basic integer operations.
 
 class ToStringAsFixedTest {
   static void testMain() {
     Expect.equals("2.000", 2.0.toStringAsFixed(3));
     Expect.equals("2.100", 2.1.toStringAsFixed(3));
     Expect.equals("2.120", 2.12.toStringAsFixed(3));
@@ skipping 92 matching lines @@
       }
       Expect.equals(true, thrown);
     }
   }
 }
 
 
 main() {
   ToStringAsFixedTest.testMain();
 }