Make Kotlin tuple example similar to Swift

[JonLatane]

Why?

• The tuples example used data classes instead of tuples/Pairs.
• This was not really analogous to the corresponding Swift implementation.

What changed?

• Used the to operator function in the tuple example.

[dcow]

Just came here to fix this. Already done! Except I don't see it in the diff. Did you forget some commits?

[dcow]

Oh I see you just added it at the top.

[alxrm]

@JonLatane, I'm sorry, but that would generally be wrong, because you would not get a Triple<A, B, C>, but this:

(Yeah, I do realise how much outdated my answer is, but still)