Make "pub run foo" run "pub run foo:foo" rather than "pub run bin/foo"

sdk/lib/_internal/pub/test/run/runs_app_in_entrypoint_with_warning_test.dart

Index: sdk/lib/_internal/pub/test/run/runs_app_in_entrypoint_with_warning_test.dart
diff --git a/sdk/lib/_internal/pub/test/run/runs_app_in_entrypoint_test.dart b/sdk/lib/_internal/pub/test/run/runs_app_in_entrypoint_with_warning_test.dart
similarity index 72%
copy from sdk/lib/_internal/pub/test/run/runs_app_in_entrypoint_test.dart
copy to sdk/lib/_internal/pub/test/run/runs_app_in_entrypoint_with_warning_test.dart
index e3cb233f8634b569adf10d2b57c82f082ae93fa2..922525b5e1e2beb1b09b5256b64149999fc4bd4a 100644
--- a/sdk/lib/_internal/pub/test/run/runs_app_in_entrypoint_test.dart
+++ b/sdk/lib/_internal/pub/test/run/runs_app_in_entrypoint_with_warning_test.dart
@@ -2,6 +2,8 @@
 // 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 'package:path/path.dart' as p;
+
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 
@@ -27,6 +29,12 @@ main() {
 
     var pub = pubRun(args: ["script"]);
     pub.stdout.expect("stdout output");
+    pub.stderr.expect(
+        'In future releases, "pub run script" will mean the same thing as "pub '
+            'run script:script".');
+    pub.stderr.expect(
+        'Run "pub run ${p.join('bin', 'script')}" explicitly to run the local '
+            'executable.');
     pub.stderr.expect("stderr output");
     pub.shouldExit(123);
   });