dart2js: run dartfmt on tests

tests/compiler/dart2js_native/native_constructor_name_test.dart

Index: tests/compiler/dart2js_native/native_constructor_name_test.dart
diff --git a/tests/compiler/dart2js_native/native_constructor_name_test.dart b/tests/compiler/dart2js_native/native_constructor_name_test.dart
index 07a7a95b5dceb5ce8b5b54d32aef73d5c2b3ab31..76a30d79885de87f942cdf1cef320fa5a0f1839e 100644
--- a/tests/compiler/dart2js_native/native_constructor_name_test.dart
+++ b/tests/compiler/dart2js_native/native_constructor_name_test.dart
@@ -11,15 +11,14 @@
 import "dart:_js_helper";
 import "package:expect/expect.dart";
 
-class A {
-}
+class A {}
 
 @Native("A")
 class Z {
   foo() => 100;
 }
 
-makeZ() native;
+makeZ() native ;
 
 void setup() native """
 function A(){}
@@ -34,5 +33,5 @@ main() {
 
   Expect.equals(100, z.foo());
 
-  Expect.throws(() => a.foo(),  (ex) => ex is NoSuchMethodError);
+  Expect.throws(() => a.foo(), (ex) => ex is NoSuchMethodError);
 }