Regenerate pub sources.

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

Index: sdk/lib/_internal/pub_generated/test/transformer/asset_not_found_exceptions_are_detectable_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/transformer/asset_not_found_exceptions_are_detectable_test.dart b/sdk/lib/_internal/pub_generated/test/transformer/asset_not_found_exceptions_are_detectable_test.dart
index 9faf8712e31b2e0be2935149f1af204aac633874..12e3816287f5a97b1f2c19dcfe6ef62cff458510 100644
--- a/sdk/lib/_internal/pub_generated/test/transformer/asset_not_found_exceptions_are_detectable_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/transformer/asset_not_found_exceptions_are_detectable_test.dart
@@ -1,9 +1,17 @@
+// Copyright (c) 2014, 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 'dart:convert';
+
 import 'package:scheduled_test/scheduled_stream.dart';
+
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import '../serve/utils.dart';
+
 final transformer = """
 import 'dart:async';
 import 'dart:convert';
@@ -28,6 +36,7 @@ class GetInputTransformer extends Transformer {
   }
 }
 """;
+
 main() {
   initConfig();
   withBarbackVersions("any", () {
@@ -38,13 +47,18 @@ main() {
         }),
             d.dir("lib", [d.dir("src", [d.file("transformer.dart", transformer)])]),
             d.dir("web", [d.file("foo.txt", "foo")])]).create();
+
       createLockFile('myapp', pkg: ['barback']);
+
       var server = pubServe();
       requestShouldSucceed("foo.txt", JSON.encode({
         "package": "myapp",
         "path": "nonexistent"
       }));
       endPubServe();
+
+      // Since the AssetNotFoundException was caught and handled, the server
+      // shouldn't print any error information for it.
       server.stderr.expect(isDone);
     });
   });