Exchange uppercase, as wished by DL7BST

contest/models.py

@@ -63,7 +63,7 @@ class QSO(models.Model):
 	ownNo = models.IntegerField(verbose_name='Nr-S')
 	otherNo = models.IntegerField(verbose_name='Nr-R')
 
-	refStr = models.CharField(max_length=20, verbose_name="Exc")
+	refStr = models.CharField(max_length=20, verbose_name="EXC")
 	ref = models.ForeignKey(Reference, null=True, blank=True)
 
 	remarks = models.CharField(max_length=50, blank=True)