dart2js: run dartfmt on tests

tests/compiler/dart2js/field_update_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:async_helper/async_helper.dart";
 import 'compiler_helper.dart';
 
 // Test for emitting JavaScript pre- and post-increment and assignment ops.
 
@@ skipping 62 matching lines @@
   var a = 42;
   int foo() { var r = a; a = a * 2; return a; }  // this.a *= 2
 }
 
 void main() {
   var a = new A();
   print(a.foo());
 }
 """;
 
-
 main() {
   test(String code, Function f) {
     asyncTest(() => compileAll(code, disableInlining: true).then((generated) {
-      Expect.isTrue(f(generated));
-    }));
+          Expect.isTrue(f(generated));
+        }));
   }
 
   test(TEST_1, (generated) => generated.contains(r'return this.a++;'));
   test(TEST_2, (generated) => generated.contains(r'return ++this.a;'));
   test(TEST_3, (generated) => generated.contains(r'return this.a--;'));
   test(TEST_4, (generated) => generated.contains(r'return --this.a;'));
   test(TEST_5, (generated) => generated.contains(r' this.a -= 2;'));
   test(TEST_6, (generated) => generated.contains(r' this.a *= 2;'));
 }