docs: def clean_path_element(text, max_length=None, separator='_'):
      """ Replace characters that conflict with a free OS choice when in a file system path.
  
      :param text: the string to be cleaned
      :param max_length: the maximum length of the output string
      :param separator: the separator used for rafcon.core.storage.storage.limit_text_max_length
      :return:
      """
      elements_to_replace = REPLACED_CHARACTERS_FOR_NO_OS_LIMITATION
      for elem, replace_with in elements_to_replace.items():
          text = text.replace(elem, replace_with)
      if max_length is not None:
          text = limit_text_max_length(text, max_length, separator)
      return text