Regenerate pub sources.

sdk/lib/_internal/pub_generated/test/transformer/fails_to_load_a_transform_with_an_import_error_test.dart

Index: sdk/lib/_internal/pub_generated/test/transformer/fails_to_load_a_transform_with_an_import_error_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/transformer/fails_to_load_a_transform_with_an_import_error_test.dart b/sdk/lib/_internal/pub_generated/test/transformer/fails_to_load_a_transform_with_an_import_error_test.dart
index 0ce85de818b9927d22dc8e98f6542ec9840f96eb..6b6df1016a700831d8bbd938a4b95133b0f02453 100644
--- a/sdk/lib/_internal/pub_generated/test/transformer/fails_to_load_a_transform_with_an_import_error_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/transformer/fails_to_load_a_transform_with_an_import_error_test.dart
@@ -1,10 +1,20 @@
+// 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.
+
 library pub_tests;
+
 import 'package:scheduled_test/scheduled_test.dart';
+
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import '../serve/utils.dart';
+
 main() {
   initConfig();
+
+  // An import error will cause the isolate API to fail synchronously while
+  // loading the transformer.
   withBarbackVersions("any", () {
     integration("fails to load a transform with an import error", () {
       d.dir(appPath, [d.pubspec({
@@ -17,6 +27,7 @@ main() {
                     d.dir(
                         "src",
                         [d.file("transformer.dart", "import 'does/not/exist.dart';")])])]).create();
+
       createLockFile('myapp', pkg: ['barback']);
       var pub = startPubServe();
       pub.stderr.expect("Unhandled exception:");