I used the subscript 2 unicode character (U+2082). As far as I know, HN's formatting doesn't include anything to do subscripts. (At least, https://news.ycombina

I used the subscript 2 unicode character (U+2082). As far as I know, HN's formatting doesn't include anything to do subscripts. (At least, https://news.ycombinator.com/formatdoc https://news.ycombinator.com/formatdoc does not mention it.)