LICENSE.md: Remove trailing whitespace
Use <br> to indicate a line break, as we do in README.md, in order to
make checkstyle happy.
diff --git a/LICENSE.md b/LICENSE.md
index ecf264b..25b38d9 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -91,7 +91,7 @@
The Modified (3-clause) BSD License
===================================
-Copyright (C)2009-2020 D. R. Commander. All Rights Reserved.
+Copyright (C)2009-2020 D. R. Commander. All Rights Reserved.<br>
Copyright (C)2015 Viktor Szathmáry. All Rights Reserved.
Redistribution and use in source and binary forms, with or without
