def link_to_issue(self, request, queryset):
        for article in queryset:
            tasks.link_article_to_issue.delay(article.pk)

        count = queryset.count()
        if count >= 2:
            message = (count,) % u'%s tasks were scheduled'
        else:
            message = u'%s task was scheduled' % (count,)
        self.message_user(request, message)
dataset/ETHPy150Open scieloorg/scielo-manager/scielomanager/journalmanager/admin.py/ArticleAdmin.link_to_issue/swapped operands of `%`