docs: def revocation_date(self, value):
          """
          A datetime.datetime object of when the certificate was revoked, if the
          status is not "good" or "unknown".
          """
  
          if value is not None and not isinstance(value, datetime):
              raise TypeError(_pretty_message(
                  '''
                  revocation_date must be an instance of datetime.datetime, not %s
                  ''',
                  _type_name(value)
              ))
  
          self._revocation_date = value