code: def add_potential(self, *patterns):
          ''' Add a potential config file pattern '''
          for ptn in patterns:
              self.__potential.extend(self._ptn2fn(ptn)f add_potential(self, *patterns):
          ''' Add a potential config file pattern '''
          for ptn in patterns:
              self.__potential.extend(self._ptn2fn(ptn))
docs: Add a potential config file pattern