func shouldPrune(log *logrus.Entry, botName string) func(github.IssueComment) bool {
	return func(comment github.IssueComment) bool {
		if comment.User.Login != botName {
			return false
		}
		return strings.Contains(comment.Body, needsSIGMessage)
	}
}
func shouldPrune(log *logrus.Entry, botName string) func(github.IssueComment) bool {
	return func(comment github.IssueComment) bool {
		if comment.User.Login != botName {
			return false
		}
		return strings.Contains(comment.Body, needsSIGMessage)
	}
}
// shouldPrune finds comments left by this plugin.