Whitespace fix.

celery/models.py

@@ -10,6 +10,7 @@ class TaskMeta(models.Model):
     task_id = models.CharField(_(u"task id"), max_length=255, unique=True)
     is_done = models.BooleanField(_(u"is done"), default=False)
     date_done = models.DateTimeField(_(u"done at"), auto_now=True)
+
     objects = TaskManager()
 
     class Meta: