A brazilian CPF

Possible errors when dealing with CPFs

Turn a valid list of integers into a CPF. (fromList [1,2,3,4,5,6,7,8,9,0,9] |> Result.map show) == Ok "123.456.789-09"

Turn a valid string into a CPF. (fromText "12345678909" |> Result.map show) == Ok "123.456.789-09" (fromText "123.456.789-09" |> Result.map show) == Ok "123.456.789-09"

Turn a CPF into a string.

Pretty print a given CPF