Fixed #16080 -- Handle admin list filter items with two characters better. Thanks, Ales Zoulek and Julien Phalip.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16274 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/modeladmin/models.py

@@ -34,6 +34,7 @@ class ValidationTestModel(models.Model):
     is_active = models.BooleanField()
     pub_date = models.DateTimeField()
     band = models.ForeignKey(Band)
+    no = models.IntegerField(verbose_name="Number", blank=True, null=True) # This field is intentionally 2 characters long. See #16080.
 
     def decade_published_in(self):
         return self.pub_date.strftime('%Y')[:3] + "0's"