Cleanup: trailing spaces

Applied to newly added files in 2.8

source/blender/gpu/GPU_immediate.h

@@ -4,7 +4,7 @@
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version. 
+ * of the License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -18,7 +18,7 @@
  * The Original Code is Copyright (C) 2016 Blender Foundation.
  * All rights reserved.
  *
- * 
+ *
  * Contributor(s): Mike Erwin
  *
  * ***** END GPL LICENSE BLOCK *****