Proposal: Bring the Contravariant class to base

[Tony Morris]

FWIW, this is due to an earlier mistake, where it was named CoFunctor.
It has since been corrected to Contravariant, but the misnomer still
hangs around a little.


On 13/09/17 07:44, Daniel Díaz Casanueva wrote:
> Contravariant is very similar to Functor (some people call it CoFunctor)


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