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

sdk/lib/_internal/pub_generated/test/upgrade/report/leading_character_shows_change_test.dart

 // Copyright (c) 2013, 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.
 
 library pub_tests;
 
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 
 main() {
   initConfig();
   integration("the character before each package describes the change", () {
     servePackages((builder) {
       builder.serve("added", "1.0.0");
       builder.serve("downgraded", "1.0.0");
       builder.serve("downgraded", "2.0.0");
       builder.serve("overridden", "1.0.0");
       builder.serve("removed", "1.0.0");
       builder.serve("source_changed", "1.0.0");
       builder.serve("upgraded", "1.0.0");
       builder.serve("upgraded", "2.0.0");
       builder.serve("unchanged", "1.0.0");
     });
 
-    d.dir("description_changed_1", [
-      d.libDir("description_changed"),
-      d.libPubspec("description_changed", "1.0.0")
-    ]).create();
+    d.dir(
+        "description_changed_1",
+        [
+            d.libDir("description_changed"),
+            d.libPubspec("description_changed", "1.0.0")]).create();
 
-    d.dir("description_changed_2", [
-      d.libDir("description_changed"),
-      d.libPubspec("description_changed", "1.0.0")
-    ]).create();
+    d.dir(
+        "description_changed_2",
+        [
+            d.libDir("description_changed"),
+            d.libPubspec("description_changed", "1.0.0")]).create();
 
-    d.dir("source_changed", [
-      d.libDir("source_changed"),
-      d.libPubspec("source_changed", "1.0.0")
-    ]).create();
+    d.dir(
+        "source_changed",
+        [d.libDir("source_changed"), d.libPubspec("source_changed", "1.0.0")]).create();
 
     // Create the first lockfile.
-    d.dir(appPath, [
-      d.pubspec({
+    d.dir(appPath, [d.pubspec({
         "name": "myapp",
         "dependencies": {
-          "description_changed": {"path": "../description_changed_1"},
+          "description_changed": {
+            "path": "../description_changed_1"
+          },
           "downgraded": "2.0.0",
           "removed": "any",
           "source_changed": "any",
           "unchanged": "any",
           "upgraded": "1.0.0"
         },
         "dependency_overrides": {
           "overridden": "any"
         }
-      })
-    ]).create();
+      })]).create();
 
     pubGet();
 
     // Change the pubspec.
-    d.dir(appPath, [
-      d.pubspec({
+    d.dir(appPath, [d.pubspec({
         "name": "myapp",
         "dependencies": {
           "added": "any",
-          "description_changed": {"path": "../description_changed_2"},
+          "description_changed": {
+            "path": "../description_changed_2"
+          },
           "downgraded": "1.0.0",
-          "source_changed": {"path": "../source_changed"},
+          "source_changed": {
+            "path": "../source_changed"
+          },
           "unchanged": "any",
           "upgraded": "2.0.0"
         },
         "dependency_overrides": {
           "overridden": "any"
         }
-      })
-    ]).create();
+      })]).create();
 
     // Upgrade everything.
     pubUpgrade(output: new RegExp(r"""
 Resolving dependencies\.\.\..*
 \+ added .*
 \* description_changed .*
 < downgraded .*
 ! overridden .*
 \* source_changed .*
   unchanged .*
 > upgraded .*
 These packages are no longer being depended on:
 - removed .*
 """, multiLine: true));
   });
 }