Proposal: rename Data.Map.fromAscList to Data.Map.unsafeFromAscList

[Neil Mitchell]

Hi

> Do I really need to point out the difference between head and fromAscList?
>
> fromAscList is total but may badly destroy the internal (invariant of
> the) representation. head at least crashes (hopefully fairly soon) when
> called wrongly.

Better example, sortBy f, where f isn't a valid ordering function. It
works, but destroyed internal invariants. Should it be uncheckedSortBy
f ?

Thanks

Neil