dart2js: run dartfmt on tests

tests/compiler/dart2js_native/native_exception_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // Test that dart2js can handle unexpected exception types.
 
 library native_exception_test;
 
 import 'dart:_foreign_helper' show JS;
 import 'dart:_js_helper';
 import 'package:expect/expect.dart';
 
 main() {
   var previous;
   check(e) {
     print('$e');
     Expect.equals(e, e);
     Expect.notEquals(e, new Object());
     Expect.notEquals(e, previous);
     previous = e;
     return '$e' != '[object Object]';
   }
-  Expect.throws(() { JS('void', 'noGlobalVariableWithThisName'); }, check);
-  Expect.throws(() { JS('void', 'throw 3'); }, check);
-  Expect.throws(
-      () {
-        JS('bool', 'Object.prototype.hasOwnProperty.call(undefined, "foo")');
-      },
-      check);
-  Expect.throws(() { JS('void', 'throw new ReferenceError()'); }, check);
-  Expect.throws(() { JS('void', 'throw void 0'); }, check);
-  Expect.throws(() { JS('void', 'throw "a string"'); }, check);
-  Expect.throws(() { JS('void', 'throw null'); }, check);
+  Expect.throws(() {
+    JS('void', 'noGlobalVariableWithThisName');
+  }, check);
+  Expect.throws(() {
+    JS('void', 'throw 3');
+  }, check);
+  Expect.throws(() {
+    JS('bool', 'Object.prototype.hasOwnProperty.call(undefined, "foo")');
+  }, check);
+  Expect.throws(() {
+    JS('void', 'throw new ReferenceError()');
+  }, check);
+  Expect.throws(() {
+    JS('void', 'throw void 0');
+  }, check);
+  Expect.throws(() {
+    JS('void', 'throw "a string"');
+  }, check);
+  Expect.throws(() {
+    JS('void', 'throw null');
+  }, check);
 }