Arch linux disable trackpad (touchpad) middle click on ThinkPad T480

instructions.sh

$ xinput
⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
⎜   ↳ Raydium Corporation Raydium Touch System	id=9	[slave  pointer  (2)]
⎜   ↳ Synaptics TM3276-022                    	id=13	[slave  pointer  (2)]
⎜   ↳ TPPS/2 IBM TrackPoint                   	id=14	[slave  pointer  (2)]
⎣ Virtual core keyboard                   	id=3	[master keyboard (2)]
    ↳ Virtual core XTEST keyboard             	id=5	[slave  keyboard (3)]
    ↳ Power Button                            	id=6	[slave  keyboard (3)]
    ↳ Video Bus                               	id=7	[slave  keyboard (3)]
    ↳ Sleep Button                            	id=8	[slave  keyboard (3)]
    ↳ Integrated Camera: Integrated C         	id=10	[slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard            	id=11	[slave  keyboard (3)]
    ↳ ThinkPad Extra Buttons                  	id=12	[slave  keyboard (3)]
    
$ xinput get-button-map 13
1 2 3 4 5 6 7

# https://unix.stackexchange.com/a/438800/108077
# 0 index = device id
# 1 index = left click
# 2 index = middle click
# 3 index = right click
# here's were setting index 2 (middle click) to match index 1 (right click) so there is no empty gap when clicking.
# the rest are other buttons and scrolling.
$ xinput set-button-map 13 1 1 3 4 5 6 7

# add to startup script
$ echo "xinput set-button-map 13 1 1 3 4 5 6 7" >> ~/.xinitrc