dart2js: run dartfmt on tests

tests/compiler/dart2js_extra/for_test.dart

Index: tests/compiler/dart2js_extra/for_test.dart
diff --git a/tests/compiler/dart2js_extra/for_test.dart b/tests/compiler/dart2js_extra/for_test.dart
index 068b4b480fea9af0fda343b92985838b5ff7f133..fc910be454d3291f4f0d0b493a8d075a2af4579a 100644
--- a/tests/compiler/dart2js_extra/for_test.dart
+++ b/tests/compiler/dart2js_extra/for_test.dart
@@ -55,7 +55,7 @@ void for5() {
 void for6() {
   var i = 0;
   var sum = 0;
-  for(; i < 5; i++) {
+  for (; i < 5; i++) {
     sum += i;
   }
   Expect.equals(5, i);
@@ -63,7 +63,7 @@ void for6() {
 
   sum = 0;
   i = 0;
-  for(; i < 5;) {
+  for (; i < 5;) {
     sum += i;
     i++;
   }
@@ -71,7 +71,7 @@ void for6() {
   Expect.equals(10, sum);
 
   sum = 0;
-  for(i = 0; i < 5;) {
+  for (i = 0; i < 5;) {
     sum += i;
     i++;
   }