dart2js: run dartfmt on tests

tests/compiler/dart2js_extra/for_test.dart

 // Copyright (c) 2011, 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";
 
 void for1() {
   var cond = true;
   var result = 0;
   for (var x = 0; cond; x = x + 1) {
@@ skipping 37 matching lines @@
   for (i = 0; i < 5; i++) {
     sum += i;
   }
   Expect.equals(5, i);
   Expect.equals(10, sum);
 }
 
 void for6() {
   var i = 0;
   var sum = 0;
-  for(; i < 5; i++) {
+  for (; i < 5; i++) {
     sum += i;
   }
   Expect.equals(5, i);
   Expect.equals(10, sum);
 
   sum = 0;
   i = 0;
-  for(; i < 5;) {
+  for (; i < 5;) {
     sum += i;
     i++;
   }
   Expect.equals(5, i);
   Expect.equals(10, sum);
 
   sum = 0;
-  for(i = 0; i < 5;) {
+  for (i = 0; i < 5;) {
     sum += i;
     i++;
   }
   Expect.equals(5, i);
   Expect.equals(10, sum);
 }
 
 void main() {
   for1();
   for2();
   for3();
   for4();
   for5();
   for6();
 }