dart2js: run dartfmt on tests

tests/compiler/dart2js_extra/mirrors_used_warning_test.dart

Index: tests/compiler/dart2js_extra/mirrors_used_warning_test.dart
diff --git a/tests/compiler/dart2js_extra/mirrors_used_warning_test.dart b/tests/compiler/dart2js_extra/mirrors_used_warning_test.dart
index 343e09098164ef4b226146fc4c40997a1aa8472d..4a8a6492db396ba2268d81b0f11fa353e42fc7b0 100644
--- a/tests/compiler/dart2js_extra/mirrors_used_warning_test.dart
+++ b/tests/compiler/dart2js_extra/mirrors_used_warning_test.dart
@@ -24,15 +24,19 @@ runTests() {
   Expect.equals("foo", new A().foo);
   Expect.isTrue(lines.isEmpty);
   var barResult = new A().bar;
-  Expect.equals("bar", barResult);           /// minif: ok
+  Expect.equals("bar", barResult);
+
+  /// minif: ok
   Expect.isTrue(lines.length == 1);
   var line = lines.first;
   Expect.isTrue(line.contains("Warning") &&
-                line.contains("bar") &&      /// minif: continued
-                line.contains("minif"));
+      line.contains("bar") &&
+
+      /// minif: continued
+      line.contains("minif"));
 }
 
 main() {
   runZoned(runTests,
-           zoneSpecification: new ZoneSpecification(print: capturePrint));
+      zoneSpecification: new ZoneSpecification(print: capturePrint));
 }