<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_error_hint(self, ctx):
 """Get a stringified version of the param for use in error messages to indicate which param caused the error. """

        hint_list = self.opts or [self.human_readable_name]
        return ' / '.join('"%s"' % x for x in hint_list)