dart2js: run dartfmt on tests

tests/compiler/dart2js/constant_namer_test.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.
 
 import 'package:async_helper/async_helper.dart';
 import 'package:expect/expect.dart';
 import 'compiler_helper.dart';
 
 const String TEST_ONE = r"""
   class Token {
@@ skipping 10 matching lines @@
     const Token(true, false).use();
   }
 """;
 
 main() {
   check(generated, text) {
     Expect.isTrue(generated.contains(text), text);
   }
 
   asyncTest(() => compile(TEST_ONE, entry: 'test').then((String generated) {
-    check(generated, '.List_12_53.');
-    check(generated, '.Token_start_null.');
-    check(generated, '.Token_end_null.');
-    check(generated, '.Token_yes_12.');
-    check(generated, '.Token_true_false.');
-  }));
+        check(generated, '.List_12_53.');
+        check(generated, '.Token_start_null.');
+        check(generated, '.Token_end_null.');
+        check(generated, '.Token_yes_12.');
+        check(generated, '.Token_true_false.');
+      }));
 }