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Update comonad.ex #109

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Update comonad.ex #109

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2 changes: 1 addition & 1 deletion lib/witchcraft/comonad.ex
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Expand Up @@ -5,7 +5,7 @@ defclass Witchcraft.Comonad do
The dual of monads, `Comonad` brings an unwrapping function to `Extend`able data.

Note that the unwrapping function (`extract`) *must return a value*, and is not
available on many data structres that have an empty element. For example,
available on many data structures that have an empty element. For example,
there is no `Comonad` instance for `List` because we cannot pull a value
out of `[]`.

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