Regenerate pub sources.

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

+// 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 '../descriptor.dart' as d;
 import '../test_pub.dart';
+
 main() {
   initConfig();
   integration(
       "downgrades a locked package's dependers in order to get it to " "min version",
       () {
     servePackages((builder) {
       builder.serve("foo", "2.0.0", deps: {
         "bar": ">1.0.0"
       });
       builder.serve("bar", "2.0.0");
     });
+
     d.appDir({
       "foo": "any",
       "bar": "any"
     }).create();
+
     pubGet();
+
     d.packagesDir({
       "foo": "2.0.0",
       "bar": "2.0.0"
     }).validate();
+
     servePackages((builder) {
       builder.serve("foo", "1.0.0", deps: {
         "bar": "any"
       });
       builder.serve("bar", "1.0.0");
     });
+
     pubDowngrade(args: ['bar']);
+
     d.packagesDir({
       "foo": "1.0.0",
       "bar": "1.0.0"
     }).validate();
   });
 }