code: def _stringlist(*args):
      
      return list(itertools.chain.from_iterable(itertools.repeat(x,1) if stringy(x) else x for x in args if x))
docs: Take a lists of strings or strings and flatten these into
      a list of strings.
  
      Arguments:
      - `*args`: "" or [""...]
  
      Return: [""...]
      Exceptions: None