from typing import List


def format_os_cmd(cmd: List[str]) -> str:
    """
    Format OS command for readability (used to display string used to execute this software)

    :param cmd: Command to be passed to os.system(.), stored as a list
                whose elements are the options/flags.

    :return: Formatted string.
    """

    return "Calling " + ' '.join(cmd).replace("--", " \\ \n\t--")