[mmcwilliams]

It's obviously down to taste, but what I've seen over and over is a comment per line which to me is excessive outside it being requested of absolute beginners.

That happens and also the model can't decide if it wants the comment on the line before the code or if everything should be appended to the line itself so when I see both styles within a single project it's another signal. People generally have a style that they stick with.