def build_titles_list(title, args):
  """Build a list of titles from the 'title' option and arguments.

  Args:
    title: NoneType or unicode Title given to options.title
    args: list Leftover arguments on the command line, presumably extra titles.

  Returns:
    List of strings or [None].

  """
  # If args is non-empty, assume the user is giving us titles to get
  if args:
    titles_list = args
    # If options.title is also given, add it to the list of titles
    if title:
      titles_list.insert(0,title)
  else:
    titles_list = [title]
  return titles_list