I was looking for a way to access the last element of a sequence. In the documentation, I easily found `a[a.high]` but I wanted something shorter, like Python `a[-1]`.
It took me a surprisingly long time to find `a[^1]`. I think that this feature deserves to be mentioned in the documentation, near the description of `high` and `low`. Currently it can be deduced from the description of slices but this is not at all obvious.
