docs: def remove_indent_lines(s):
      """
      :param str s:
      :return: remove as much indentation as possible
      :rtype: str
      """
      if not s:
          return ""
      lines = s.splitlines(True)
      prefix = get_same_indent_prefix(lines)
      if prefix is None:  # not in expected format. just lstrip all lines
          return "".join([l.lstrip() for l in lines])
      return "".join([l[len(prefix):] for l in lines])