Current brightness % reported is wrong when using exponant

[7thFox]

If I set the value of intel_backlight to 1199, the % reported is correct:

sudo brightnessctl --device='intel_backlight' set 1199
Updated device 'intel_backlight':
Device 'intel_backlight' of class 'backlight':
    Current brightness: 1199 (100%)
    Max brightness: 1200

However, if I set this with exponant the reported brightness is 0% (I was trying to figure out how it worked at the time, so don't mind my nonsense settings)

sudo brightnessctl --device='intel_backlight' -e=4 set 5%-
Updated device 'intel_backlight':
Device 'intel_backlight' of class 'backlight':
    Current brightness: 1200 (100%)
    Max brightness: 1200
sudo brightnessctl --device='intel_backlight' -e=4 set 5%-
Updated device 'intel_backlight':
Device 'intel_backlight' of class 'backlight':
    Current brightness: 1199 (0%)
    Max brightness: 1200

[Hummer12007]

-e=4 is wrong: equals sign is only supported with the long option format. Use -e4, or --exponent=4. Added an error check.