dart2js: run dartfmt on tests

tests/compiler/dart2js_native/native_class_fields_test.dart

Index: tests/compiler/dart2js_native/native_class_fields_test.dart
diff --git a/tests/compiler/dart2js_native/native_class_fields_test.dart b/tests/compiler/dart2js_native/native_class_fields_test.dart
index cf6b1a943c70c4ac1b0ddec4b18d811ae757296d..45a45bf3235b8d73c9f1b59daa62c28a779873ea 100644
--- a/tests/compiler/dart2js_native/native_class_fields_test.dart
+++ b/tests/compiler/dart2js_native/native_class_fields_test.dart
@@ -14,7 +14,6 @@ class A {
   int method(int z) => myLongPropertyName;
 }
 
-
 void setup() native r"""
 function getter() {
   return ++this.getValue;
@@ -40,7 +39,7 @@ function A(){
 makeA = function(){return new A;};
 """;
 
-A makeA() native;
+A makeA() native ;
 
 main() {
   setup();