dart2js: run dartfmt on tests

tests/compiler/dart2js/no_duplicate_constructor_body2_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 'compiler_helper.dart';
 import "package:async_helper/async_helper.dart";
 
 const String CODE = """
 var x = 0;
 class A {
   A() { x++; }
 }
 
 class B extends A {
   B();
 }
 
 main() {
   new B();
   new A();
 }
 """;
 
 main() {
   asyncTest(() => compileAll(CODE).then((generated) {
-    RegExp regexp = new RegExp(r'A\$0: function');
-    Iterator<Match> matches = regexp.allMatches(generated).iterator;
-    checkNumberOfMatches(matches, 1);
-  }));
+        RegExp regexp = new RegExp(r'A\$0: function');
+        Iterator<Match> matches = regexp.allMatches(generated).iterator;
+        checkNumberOfMatches(matches, 1);
+      }));
 }