Regenerate pub sources.

sdk/lib/_internal/pub_generated/test/hosted/fail_gracefully_on_missing_package_test.dart

Index: sdk/lib/_internal/pub_generated/test/hosted/fail_gracefully_on_missing_package_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/hosted/fail_gracefully_on_missing_package_test.dart b/sdk/lib/_internal/pub_generated/test/hosted/fail_gracefully_on_missing_package_test.dart
index bb0ae39d17185936b140b78bd14db66c6bf5d576..cfb153c6495e71430ca552475342465253b6a463 100644
--- a/sdk/lib/_internal/pub_generated/test/hosted/fail_gracefully_on_missing_package_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/hosted/fail_gracefully_on_missing_package_test.dart
@@ -1,16 +1,25 @@
+// Copyright (c) 2012, 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.
+
 library pub_tests;
+
 import '../../lib/src/exit_codes.dart' as exit_codes;
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import '../test_pub.dart';
+
 main() {
   initConfig();
+
   forBothPubGetAndUpgrade((command) {
     integration('fails gracefully if the package does not exist', () {
       serveNoPackages();
+
       d.appDir({
         "foo": "1.2.3"
       }).create();
+
       pubCommand(command, error: new RegExp(r"""
 Could not find package foo at http://localhost:\d+\.
 Depended on by: