Regenerate pub sources.

sdk/lib/_internal/pub_generated/test/get/git/check_out_twice_test.dart

Index: sdk/lib/_internal/pub_generated/test/get/git/check_out_twice_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/get/git/check_out_twice_test.dart b/sdk/lib/_internal/pub_generated/test/get/git/check_out_twice_test.dart
index f2fc87e99b170c29035bf50bb460fa9252bb9352..6a7c9c7e1d00e76dcdf5c450d21ac6158ffef61a 100644
--- a/sdk/lib/_internal/pub_generated/test/get/git/check_out_twice_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/get/git/check_out_twice_test.dart
@@ -1,17 +1,27 @@
+// 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('checks out a package from Git twice', () {
     ensureGit();
+
     d.git('foo.git', [d.libDir('foo'), d.libPubspec('foo', '1.0.0')]).create();
+
     d.appDir({
       "foo": {
         "git": "../foo.git"
       }
     }).create();
+
     pubGet();
+
     d.dir(
         cachePath,
         [
@@ -20,9 +30,13 @@ main() {
                 [
                     d.dir('cache', [d.gitPackageRepoCacheDir('foo')]),
                     d.gitPackageRevisionCacheDir('foo')])]).validate();
+
     d.dir(
         packagesPath,
         [d.dir('foo', [d.file('foo.dart', 'main() => "foo";')])]).validate();
+
+    // Verify that nothing breaks if we get a Git revision that's already
+    // in the cache.
     pubUpgrade();
   });
 }