remove trailing spaces
diff --git a/test/run_tests.c b/test/run_tests.c
index b62ffbf..80402da 100644
--- a/test/run_tests.c
+++ b/test/run_tests.c
@@ -1,10 +1,10 @@
 /*==============================================================================
  run_tests.c -- test aggregator and results reporting
- 
+
  Copyright (c) 2018-2019, Laurence Lundblade. All rights reserved.
- 
+
  SPDX-License-Identifier: BSD-3-Clause
- 
+
  See BSD-3-Clause license in README.md
 
  Created on 9/30/18