
  -spec atom_to_list(Atom) -> string() when Atom :: atom().

  Returns a list of unicode code points corresponding to the text
  representation of Atom, for example:

    > atom_to_list('Erlang').
    "Erlang"

    > atom_to_list('你好').
    [20320,22909]

  See unicode(3) for how to convert the resulting list to
  different formats.
