well, maybe just add that the first character is + or - to signify agreement or disagreement, and then if anything else, a space first
Discussion
i don't see any reason why to expand it more than that, to allow other signifiers, just stick with one simple one less bullshit faulty implementation problems
even you can ignore the whitespace idea, but i think a space is a good one, broadening anything is a nightmare... + or - and then a space character if anything else comes after, and the rest is parsed as a comment that humans might want to read
