This is not so much of a programming question as it is about the convention. What does 'Ack' conventionally mean as an alternative to just reply to a comment on a code review in Gerrit?
Does it mean I agree with you but I am not going to change it and/or I have read and disagree with your suggestion?
I realize this is very similar to another question asked by amphibient but not quite the same as that has to do with 'Done':