dart2js: run dartfmt on tests

tests/compiler/dart2js/js_throw_behavior_test.dart

 // Copyright (c) 2014, 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';
 import 'package:compiler/src/native/native.dart';
 import 'package:compiler/src/js/js.dart' as js;
 
 void test(String source, NativeThrowBehavior expectedThrowBehavior) {
   js.Template template = js.js.parseForeignJS(source);
@@ skipping 76 matching lines @@
   test('Array', NEVER);
   test('Object', NEVER);
 
   test('typeof #', NEVER);
   test('typeof console', NEVER);
   test('typeof foo.#', MAY);
   test('typeof #.foo', NULL_NSM);
 
   test('throw 123', MUST);
   test('throw #', MUST);
-  test('throw #.x', MUST);        // Could be better: is also an NSM guard.
+  test('throw #.x', MUST); // Could be better: is also an NSM guard.
   test('throw #.x = 123', MUST);
 }