code: def string_found(self, ypos, xpos, string):
          
          found = self.string_get(ypos, xpos, len(string))
          log.debug('string_found() saw "{0}"'.format(found))
          return found == string
docs: Return True if `string` is found at screen co-ordinates
              `ypos`/`xpos`, False otherwise.
  
              Co-ordinates are 1 based, as listed in the status area of the
              terminal.