
  [;1m-spec split_binary(Bin, Pos) -> {binary(), binary()}[0m
  [;1m                      when Bin :: binary(), Pos :: non_neg_integer().[0m

  Returns a tuple containing the binaries that are the result of
  splitting [;;4mBin[0m into two parts at position [;;4mPos[0m. This is not a
  destructive operation. After the operation, there are three
  binaries altogether. Example:

    > B = list_to_binary("0123456789").
    <<"0123456789">>
    > byte_size(B).
    10
    > {B1, B2} = split_binary(B,3).
    {<<"012">>,<<"3456789">>}
    > byte_size(B1).
    3
    > byte_size(B2).
    7
