Language tests updated to use const instead of final.

tests/language/list_literal3_test.dart

 // Copyright (c) 2011, 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.
-// Check that arrays from final array literals are immutable.
+// Check that arrays from const array literals are immutable.
 
 class ListLiteral3Test {
 
-  static final List<String> canonicalJoke = const ["knock", "knock"];
+  static const List<String> canonicalJoke = const ["knock", "knock"];
 
   static testMain() {
 
     List<String> joke = const ["knock", "knock"];
     // Elements of canonical lists are canonicalized.
     Expect.equals(true, joke === canonicalJoke);
     Expect.equals(true, joke[0] === joke[1]);
     Expect.equals(true, joke[0] === canonicalJoke[0]);
 
     // Lists from literals are immutable.
@@ skipping 37 matching lines @@
     } catch (UnsupportedOperationException e) {
       caughtException = true;
     }
     Expect.equals(true, caughtException);
   }
 }
 
 main() {
   ListLiteral3Test.testMain();
 }