diff --git a/doc/_common.py b/doc/_common.py
index 8479814c..d64e21db 100644
--- a/doc/_common.py
+++ b/doc/_common.py
@@ -420,7 +420,7 @@ class ShopName(object):
             ['id', 0, '商店id'],
             ['name', 0, '商店名字']
         ]
-        
+
 class Shop(object):
 
     def __init__(self):
@@ -431,7 +431,7 @@ class Shop(object):
         ]
 
 class PayMethod(object):
-    
+
     def __init__(self):
         self.fields = [
             ['id', 0, '支付方式id'],
@@ -440,9 +440,9 @@ class PayMethod(object):
             ['shop_token_type', 0, '代币类型'],
             ['pay_way_code', 0, '支付方式code'],
         ]
-            
+
 class DailySelectionGoods(object):
-    
+
     def __init__(self):
         self.fields = [
             ['id', 0, '商品表唯一id'],
@@ -456,7 +456,7 @@ class DailySelectionGoods(object):
             ['price', '', '价格(100|100000)'],
             ['pending', 0, '购买中...'],
         ]
-        
+
 class Mission(object):
 
     def __init__(self):