Regenerate pub sources.

sdk/lib/_internal/pub_generated/test/dart2js/supports_valid_options_test.dart

Index: sdk/lib/_internal/pub_generated/test/dart2js/supports_valid_options_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/dart2js/supports_valid_options_test.dart b/sdk/lib/_internal/pub_generated/test/dart2js/supports_valid_options_test.dart
index 57b2ccb29bd56780c6dbab4dfb80f09ca7ec6700..7c799f7105be60cf3416b23890e0d1151af56ca7 100644
--- a/sdk/lib/_internal/pub_generated/test/dart2js/supports_valid_options_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/dart2js/supports_valid_options_test.dart
@@ -1,7 +1,13 @@
+// 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.
+
 import 'package:scheduled_test/scheduled_test.dart';
+
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import '../serve/utils.dart';
+
 main() {
   initConfig();
   integration("supports most dart2js command-line options", () {
@@ -25,6 +31,8 @@ main() {
             }
           }]
       })]).create();
+
+    // None of these options should be rejected, either by pub or by dart2js.
     pubServe();
     requestShouldSucceed("main.dart.js", isNot(isEmpty));
     endPubServe();