dart2js: run dartfmt on tests

tests/compiler/dart2js_native/subclassing_1_test.dart

Index: tests/compiler/dart2js_native/subclassing_1_test.dart
diff --git a/tests/compiler/dart2js_native/subclassing_1_test.dart b/tests/compiler/dart2js_native/subclassing_1_test.dart
index b86130f5fe3ba3ad064d7eadcc34fdb5ead28e6e..77ca191f3b5393aed08ee2b38b71c3162976c0e3 100644
--- a/tests/compiler/dart2js_native/subclassing_1_test.dart
+++ b/tests/compiler/dart2js_native/subclassing_1_test.dart
@@ -11,7 +11,7 @@ import 'dart:_interceptors' show findInterceptorForType;
 
 @Native("A")
 class A {
-  foo(x) =>  '$x,${this.oof()}';
+  foo(x) => '$x,${this.oof()}';
   oof() => 'A';
 }
 
@@ -19,15 +19,15 @@ class B extends A {
   oof() => 'B';
 }
 
-B makeB1() native;
-B makeB2() native;
-B makeC() native;
+B makeB1() native ;
+B makeB2() native ;
+B makeC() native ;
 
 @Creates('=Object')
-getBPrototype() native;
+getBPrototype() native ;
 
 @Creates('=Object')
-getCPrototype() native;
+getCPrototype() native ;
 
 void setup() native r"""
 function A() {}