SBASE serial port -1, RAMPS spacing

Marlin/src/config/examples/Mks/Sbase/Configuration.h

  *
  * :[-1, 0, 1, 2, 3, 4, 5, 6, 7]
  */
-#define SERIAL_PORT 0
+#define SERIAL_PORT -1
 
 /**
  * This setting determines the communication speed of the printer.

Marlin/src/pins/pins_RAMPS.h

 #endif
 
 #ifndef FAN_PIN
-  #define FAN_PIN 4      // IO pin. Buffer needed
+  #define FAN_PIN           4   // IO pin. Buffer needed
 #endif
 
 //