'Helper method to process a line like \'fooarg: Blah blub\'.'

def _process_arg(self, line):

    (self._cur_arg_name, argdesc) = line.split(':', maxsplit=1)
    self._cur_arg_name = self._cur_arg_name.strip().lstrip('*')
    self.arg_descs[self._cur_arg_name] = [argdesc.strip()]
