Revert "Use native async/await support in pub."

sdk/lib/_internal/pub_generated/test/transformer/exclusion/works_on_aggregate_transformer_test.dart

 // 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 '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 import '../../serve/utils.dart';
 
@@ skipping 21 matching lines @@
       transform.addOutput(new Asset.fromString(id, contents.join('\\n')));
     });
   }
 }
 """;
 
 main() {
   initConfig();
   withBarbackVersions(">=0.14.1", () {
     integration("works on an aggregate transformer", () {
-      d.dir(appPath, [
-        d.pubspec({
+      d.dir(appPath, [d.pubspec({
           "name": "myapp",
-          "transformers": [
-            {
+          "transformers": [{
               "myapp": {
                 "\$include": ["web/a.txt", "web/b.txt", "web/c.txt"],
                 "\$exclude": "web/a.txt"
               }
-            }
-          ]
+            }]
         }),
-        d.dir("lib", [
-          d.file("transformer.dart", AGGREGATE_TRANSFORMER),
-        ]),
-        d.dir("web", [
-          d.file("a.txt", "a"),
-          d.file("b.txt", "b"),
-          d.file("c.txt", "c"),
-          d.file("d.txt", "d")
-        ])
-      ]).create();
+            d.dir("lib", [d.file("transformer.dart", AGGREGATE_TRANSFORMER),]),
+            d.dir(
+                "web",
+                [
+                    d.file("a.txt", "a"),
+                    d.file("b.txt", "b"),
+                    d.file("c.txt", "c"),
+                    d.file("d.txt", "d")])]).create();
 
       createLockFile('myapp', pkg: ['barback']);
 
       pubServe();
       requestShouldSucceed("out.txt", "b\nc");
       endPubServe();
     });
   });
 }