Clean up some trailing spaces

Marlin/gcode.h

 #if ENABLED(DEBUG_GCODE_PARSER)
   #if ENABLED(AUTO_BED_LEVELING_UBL)
     extern char* hex_address(const void * const w);
-  #else  
+  #else
     #include "hex_print_routines.h"
   #endif
   #include "serial.h"

Marlin/twibus.h

  * for the host to interpret.
  *
  *  For more information see
- *    - http://marlinfw.org/docs/gcode/M260.html 
- *    - http://marlinfw.org/docs/gcode/M261.html 
+ *    - http://marlinfw.org/docs/gcode/M260.html
+ *    - http://marlinfw.org/docs/gcode/M261.html
  *
  */
 class TWIBus {

Marlin/ubl_motion.cpp

   #include <math.h>
 
   extern float destination[XYZE];
-  
+
   #if AVR_AT90USB1286_FAMILY  // Teensyduino & Printrboard IDE extensions have compile errors without this
     inline void set_current_to_destination() { COPY(current_position, destination); }
   #else

Marlin/ultralcd_impl_HD44780.h

 
 #if ENABLED(AUTO_BED_LEVELING_UBL)
 
-  /* 
+  /**
    * These are just basic data for the 20x4 LCD work that
    * is coming up very soon.
    * Soon this will morph into a map code.