order pprint touchup

src/dexorder/order/orderstate.py

@@ -308,7 +308,11 @@ class Order:
         '''
         for i in range(len(self.order.tranches)):
             tranche = self.order.tranches[i]
-            msg += f'        {tranche} filled {await adjust_decimals(amount_token, self.tranche_filled(i))}\n'
+            msg += f'        {tranche}'
+            filled_amount = self.tranche_filled(i)
+            if filled_amount:
+                msg += f' filled {await adjust_decimals(amount_token, filled_amount)}'
+            msg += '\n'
         return msg
 
     # ORDER STATE