add some team stat

tournaments/models/team_registration.py

@@ -226,7 +226,7 @@ class TeamRegistration(models.Model):
             sign = "+"
         if team_rank == self.final_ranking:
             sign = ""
-        return f" ({sign}"+f"{team_rank})"
+        return f" ({sign}"+f"{abs(self.final_ranking - team_rank)})"
 
     def get_points_earned(self):
         return self.points_earned