Add hints to leap exercise

[abo64]

#220

[ErikSchierboom]

I wonder if people will understand the "single Boolean expression" bit. Perhaps we could link to an example?

[abo64]

Best link I could find is this one. Unfortunately it is in Java, but might still be OK?

[ricemery]

I think it would be fine to include the link.

…

On Mon, Dec 5, 2016 at 5:58 AM abo64 ***@***.***> wrote: Best link I could find is this one <http://cs.wellesley.edu/%7Ecs111/spring00/lectures/boolean-simplification.html>. Unfortunately it is in Java, but might still be OK? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#227 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABeHGzS0xvjHN2S-fpWdMH6oYAMMDp0pks5rFAp_gaJpZM4LEDxJ> .

[ErikSchierboom]

Agreed, I think it's a good hint.

[abo64]

Added the link.

[ErikSchierboom]

I think this looks fine. Merged.