Proposal #2769: Export mapAccumR from Data.Map, Data.IntMap

[Matti Niemenmaa]

Ross Paterson wrote:
> Data.Traversable.mapAccumR also works on maps, but has a different type
> (matching the one on lists, and Data.Map.mapAccum).  I would suggest
> that mapAccumRWithKey would be a consistent name for this one.

Handy, I didn't know that. In that light I agree with you on the name.

> I think a week is too short, even for no-brainers.  People take breaks.

I'm not in any particular hurry: let's then say two weeks, for now.