Revise pub build patch.

sdk/lib/_internal/pub/test/build/compiles_dart_entrypoints_to_dart_and_js_test.dart

Index: sdk/lib/_internal/pub/test/build/compiles_dart_entrypoints_to_dart_and_js_test.dart
diff --git a/sdk/lib/_internal/pub/test/build/compiles_dart_entrypoints_to_dart_and_js_test.dart b/sdk/lib/_internal/pub/test/build/compiles_dart_entrypoints_to_dart_and_js_test.dart
index 5d0b67a7cd4b1367d8b43112741bce3698b4f576..f69676a5a26c4ce44d7d63ca76e66e8b50716229 100644
--- a/sdk/lib/_internal/pub/test/build/compiles_dart_entrypoints_to_dart_and_js_test.dart
+++ b/sdk/lib/_internal/pub/test/build/compiles_dart_entrypoints_to_dart_and_js_test.dart
@@ -10,7 +10,8 @@ import '../test_pub.dart';
 main() {
   initConfig();
 
-  // TODO(rnystrom): Should also add tests that other transformers work.
+  // TODO(rnystrom): Should also add tests that other transformers work
+  // (#14556).
 
   integration("compiles Dart entrypoints to Dart and JS", () {
     // Dart2js can take a long time to compile dart code, so we increase the
@@ -28,6 +29,8 @@ main() {
       ])
     ]).create();
 
+    // TODO(rnystrom): If we flesh out the command-line output, validate that
+    // here.
     schedulePub(args: ["build"],
         output: new RegExp(r"Built 2 files!"),
         exitCode: 0);