Regenerate pub sources.

sdk/lib/_internal/pub_generated/test/barback/fails_if_dir_arg_does_not_exist_test.dart

Index: sdk/lib/_internal/pub_generated/test/barback/fails_if_dir_arg_does_not_exist_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/barback/fails_if_dir_arg_does_not_exist_test.dart b/sdk/lib/_internal/pub_generated/test/barback/fails_if_dir_arg_does_not_exist_test.dart
index f059877efd188f84abc27ef11a28330a13f6b279..3e31c5acd8de0ddf4505c96156c98a920ca361e1 100644
--- a/sdk/lib/_internal/pub_generated/test/barback/fails_if_dir_arg_does_not_exist_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/barback/fails_if_dir_arg_does_not_exist_test.dart
@@ -1,15 +1,23 @@
+// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS d.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.
+
 import 'package:scheduled_test/scheduled_test.dart';
+
 import '../../lib/src/exit_codes.dart' as exit_codes;
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import 'utils.dart';
+
 main() {
   initConfig();
+
   setUp(() {
     d.dir(
         appPath,
         [d.appPubspec(), d.dir("bar", [d.file("file.txt", "contents")])]).create();
   });
+
   pubBuildAndServeShouldFail(
       "if a specified directory doesn't exist",
       args: ["foo", "bar", "baz"],