Regenerate pub sources.

sdk/lib/_internal/pub_generated/test/run/allows_dart_extension_test.dart

Index: sdk/lib/_internal/pub_generated/test/run/allows_dart_extension_test.dart
diff --git a/sdk/lib/_internal/pub_generated/test/run/allows_dart_extension_test.dart b/sdk/lib/_internal/pub_generated/test/run/allows_dart_extension_test.dart
index 2eaee2321359b6180940fd811ffded929998bfe9..90d1d8a6547307eda58cbb47dd7f528ee256855c 100644
--- a/sdk/lib/_internal/pub_generated/test/run/allows_dart_extension_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/run/allows_dart_extension_test.dart
@@ -1,5 +1,10 @@
+// Copyright (c) 2014, 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.
+
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
+
 const SCRIPT = """
 import 'dart:io';
 
@@ -9,12 +14,14 @@ main() {
   exitCode = 123;
 }
 """;
+
 main() {
   initConfig();
   integration('allows a ".dart" extension on the argument', () {
     d.dir(
         appPath,
         [d.appPubspec(), d.dir("bin", [d.file("script.dart", SCRIPT)])]).create();
+
     var pub = pubRun(args: ["script.dart"]);
     pub.stdout.expect("stdout output");
     pub.stderr.expect("stderr output");