Tweak MarlinSerial precursor

Marlin/MarlinSerial.cpp

  */
 
 /**
-  MarlinSerial.cpp - Hardware serial library for Wiring
-  Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
-
-  Modified 23 November 2006 by David A. Mellis
-  Modified 28 September 2010 by Mark Sproul
-  Modified 14 February 2016 by Andreas Hardtung (added tx buffer)
-*/
-
+ * MarlinSerial.cpp - Hardware serial library for Wiring
+ * Copyright (c) 2006 Nicholas Zambetti.  All right reserved.
+ *
+ * Modified 23 November 2006 by David A. Mellis
+ * Modified 28 September 2010 by Mark Sproul
+ * Modified 14 February 2016 by Andreas Hardtung (added tx buffer)
+ */
 #include "MarlinSerial.h"
 
 #include "stepper.h"
-
 #include "Marlin.h"
 
 #ifndef USBCON