Regenerate pub sources.

sdk/lib/_internal/pub_generated/test/downgrade/unlock_if_necessary_test.dart

Index: sdk/lib/_internal/pub_generated/test/downgrade/unlock_if_necessary_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/downgrade/unlock_if_necessary_test.dart b/sdk/lib/_internal/pub_generated/test/downgrade/unlock_if_necessary_test.dart
index 19caef9db0dda26505b15aa644023731132da6ea..6eab79a1b8114ee51da992bac9c36a59d3faf42e 100644
--- a/sdk/lib/_internal/pub_generated/test/downgrade/unlock_if_necessary_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/downgrade/unlock_if_necessary_test.dart
@@ -1,6 +1,12 @@
+// Copyright (c) 2014, 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 '../descriptor.dart' as d;
 import '../test_pub.dart';
+
 main() {
   initConfig();
   integration(
@@ -12,21 +18,27 @@ main() {
       });
       builder.serve("foo_dep", "2.0.0");
     });
+
     d.appDir({
       "foo": "any"
     }).create();
+
     pubGet();
+
     d.packagesDir({
       "foo": "2.0.0",
       "foo_dep": "2.0.0"
     }).validate();
+
     servePackages((builder) {
       builder.serve("foo", "1.0.0", deps: {
         "foo_dep": "<2.0.0"
       });
       builder.serve("foo_dep", "1.0.0");
     });
+
     pubDowngrade(args: ['foo']);
+
     d.packagesDir({
       "foo": "1.0.0",
       "foo_dep": "1.0.0"