Fix one-off formatting issue (#379)
diff --git a/protoc_plugin/test/import_public_test.dart b/protoc_plugin/test/import_public_test.dart
index 2a4dd94..8a410d7 100644
--- a/protoc_plugin/test/import_public_test.dart
+++ b/protoc_plugin/test/import_public_test.dart
@@ -1,4 +1,5 @@
#!/usr/bin/env dart
+
// Copyright (c) 2019, 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.
