Regenerate pub sources.

sdk/lib/_internal/pub_generated/test/serve/unknown_dependency_test.dart

Index: sdk/lib/_internal/pub_generated/test/serve/unknown_dependency_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/serve/unknown_dependency_test.dart b/sdk/lib/_internal/pub_generated/test/serve/unknown_dependency_test.dart
index b3f78d55cbd65c39499fa73395f547b3e13a548c..daa3c440ba984e59a76d346a9f94997eb655bda1 100644
--- a/sdk/lib/_internal/pub_generated/test/serve/unknown_dependency_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/serve/unknown_dependency_test.dart
@@ -1,11 +1,18 @@
+// Copyright (c) 2013, 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.
+
 library pub_tests;
+
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import 'utils.dart';
+
 main() {
   initConfig();
   integration("responds with a 404 unknown dependencies", () {
     d.dir(appPath, [d.appPubspec()]).create();
+
     pubServe();
     requestShould404("packages/foo/nope.dart");
     requestShould404("assets/foo/nope.png");