def is_message(line, msg_number):
    """Return 'True' if 'line' contains the message identified by 'msg_number'.

    Parameters
    ----------
    line:       A single line from the NEST CI build log file.
    msg_number: Message number string.

    Returns
    -------
    True or False
    """

    if msg_number in line:
        return True

    return False