Attaching a tentative patch. I think it is better to document these as operations rather than special methods. It may need to be clarified that "-2 days, 0:00:22" is timedelta(-2, 22) rather than -timedelta(2, 22), but I cannot come up with anything short enough for the ops table. Maybe this should be done in a footnote.
I think it would be clearer if the footnote said something like "Negative 1 day plus 19 hours is equivalent to the timedelta argument of -5 hours)". If I hadn't been following the discussion on #python-dev the point of this doc change would have been lost on me without much closer scrutiny, so a little more explanation would help.