Countour tool doesn't do pixel perfect after you draw a line with shift

its just as said in the title, i found that just now and since its a minbor bug i thought it was best to report to avoid being missed next time

to do the bug you just hold shift draw a line release shift and then draw a slope it will not do it pixel perfect even if the option is on

can confirm. i’ll just add that to replicate this issue, the shift has to be released while holding down a mouse button.

also, doing lines this way will sometimes add a pixel at the beginning of the line.

i wanna revive this so @dacap is this on any github issue?