tests DOC white space
diff --git a/tests/test_fd_comm.c b/tests/test_fd_comm.c
index 79a1fb8..91d91a7 100644
--- a/tests/test_fd_comm.c
+++ b/tests/test_fd_comm.c
@@ -8,7 +8,7 @@
  * This source code is licensed under BSD 3-Clause License (the "License").
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *     https://opensource.org/licenses/BSD-3-Clause
  */