I think I do understand: the author either did not think this was going to be used on a tablet (after all, it teaches git in it's bare cli form, not by the aid

I think I do understand: the author either did not think this was going to be used on a tablet (after all, it teaches git in it's bare cli form, not by the aid of an point-and-click ui) - or just didn't care about it (for pretty much the same reason, or because he thought there aren't many people using git cli on a tablet anyway).