Modified Gcode to only run the cooling fan while the printer is running

[Umpa]

there is a BUG in this..
it is possible to turn off the fan when printing is done
but the stepper motor current and its driver remain powered, it is 4 watts of extra idle power..
the options are motor and stepper off after print
OR the fan off after print
NOT BOTH.. that is really not optimal, just saying.

;¡¾Action after printing is completed¡¿
M8489 P3 ; action after printing is completed
        ; 0: Turn off all motors,
        ; 1: Does not work after printing,
        ; 2: After printing is completed, return to zero, the motor is not powered
        ; 3: After the printing is completed, it drops to the maximum stroke of Z, and the motor is continuously powered.

see, you want to drop to max Z height, and then power off the motor
when you are done printing.

Thats all great and all - but on my USB stick it has a Machine parameters.gcode file, and at the end of it it has :-

;°æAction after printing is completed°ø
M8489 P3 ; action after printing is completed
        ; 0: Turn off all motors,
        ; 1: Does not work after printing,
        ; 2: After printing is completed, return to zero, the motor is not powered
        ; 3: After the printing is completed, it drops to the maximum stroke of Z, and the motor is continuously powered.

And this file is from Elegoo on the USB stick - so I don't think it's a bug at all.