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

Hey all, I had some code where the function elems said a certain key was present, but looking it up returned a Nothing. After some debugging I found out that it did work if I used Prelude's lookup in combination with toList. After even more debugging it turned out there was a fromAscList somewhere deep down in my code where it should have been a fromList. Now, I know that I shouldn't have used fromAscList and that it was totally my fault. I also realize this is something that can't easily be checked using the type system, so I propose we do the next best thing: prefix the name with 'unsafe'. -chris