Tutorial creates confusion about slices

[Rob Wolfe]

Antoon Pardon wrote:
> The following is part of the explanation on slices in the
> tutorial:
>
> The best way to remember how slices work is to think of the indices as
> pointing between characters, with the left edge of the first character
> numbered 0. Then the right edge of the last character of a string of n
> characters has index n, for example:
>
>   +---+---+---+---+---+
>   | H | e | l | p | A |
>   +---+---+---+---+---+
>   0   1   2   3   4   5
>  -5  -4  -3  -2  -1
>
> This is all very well with a simple slice like:
>
>   "HelpA"[2:4]    =>     "lp"
>
>
> But it give the wrong idea when using the following extended slice:
>
>   "HelpA"[4:2:-1]   =>   "Ap"
>
> So this doesn't result in the reverse of the previous expression while
> the explanation above suggest it does.

Clearly I understand that differently:

>>> "HelpA"[-2:-4:-1]
'pl'

--
Regards,
Rob