dart2js: run dartfmt on tests

tests/compiler/dart2js/error_token_test.dart

 // Copyright (c) 2016, 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 that we don't report invalid modifier on error tokens.
 
 library dart2js.test.error_token;
 
 import 'dart:async';
 import 'package:async_helper/async_helper.dart';
@@ skipping 14 matching lines @@
   if (error != null) {
     Expect.equals(error, diagnostics.errors.first.message.kind);
   }
   Expect.equals(0, diagnostics.warnings.length);
   Expect.equals(0, diagnostics.hints.length);
   Expect.equals(0, diagnostics.infos.length);
 }
 
 void main() {
   asyncTest(() async {
-    await runTest('''
+    await runTest(
+        '''
 main() {}
 class Foo {
         static void bar() {
                 baz());
         }
 }
-''', error: MessageKind.UNMATCHED_TOKEN);
+''',
+        error: MessageKind.UNMATCHED_TOKEN);
 
-    await runTest('''
+    await runTest(
+        '''
 main() {}
 class C {
   C(v) {
     throw '');
   }
-}''', error: MessageKind.UNMATCHED_TOKEN);
+}''',
+        error: MessageKind.UNMATCHED_TOKEN);
   });
 }