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

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

Index: sdk/lib/_internal/pub_generated/test/upgrade/report/leading_character_shows_change_test.dart
diff --git a/sdk/lib/_internal/pub/test/upgrade/report/leading_character_shows_change_test.dart b/sdk/lib/_internal/pub_generated/test/upgrade/report/leading_character_shows_change_test.dart
similarity index 67%
copy from sdk/lib/_internal/pub/test/upgrade/report/leading_character_shows_change_test.dart
copy to sdk/lib/_internal/pub_generated/test/upgrade/report/leading_character_shows_change_test.dart
index eef1946d326b80d02d40381ac4b7f6f4b7316ad5..bb567c2eaaa3f02175476c36a2228b4f0ba5ff81 100644
--- a/sdk/lib/_internal/pub/test/upgrade/report/leading_character_shows_change_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/upgrade/report/leading_character_shows_change_test.dart
@@ -22,27 +22,29 @@ main() {
       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",
@@ -52,28 +54,29 @@ main() {
         "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"""