Fix astyle issue

Author: fpistm

variants/FYSETC_S6/variant.h

@@ -173,9 +173,9 @@ extern "C" {
 //
 // SERIAL_PORT_HARDWARE_OPEN  Hardware serial ports which are open for use.  Their RX & TX
 //                            pins are NOT connected to anything by default.
-#define SERIAL_PORT_USBVIRTUAL		SerialUSB
-#define SERIAL_PORT_MONITOR     	Serial
-#define SERIAL_PORT_HARDWARE_OPEN	Serial3
+#define SERIAL_PORT_USBVIRTUAL    SerialUSB
+#define SERIAL_PORT_MONITOR       Serial
+#define SERIAL_PORT_HARDWARE_OPEN Serial3
 #endif
 
 #endif /* _VARIANT_ARDUINO_STM32_ */