diff --git a/doc/_common.py b/doc/_common.py
index 807bb63c..1d982083 100644
--- a/doc/_common.py
+++ b/doc/_common.py
@@ -1215,7 +1215,7 @@ class Sign(object):
         ]
 
 class ShopTrans(object):
-    
+
     def __init__(self):
         self.fields = [
             ['trans_id', '', 'trans_id'],
@@ -1223,15 +1223,15 @@ class ShopTrans(object):
             ['item_id', 0, 'item_id'],
             ['item_num', 0, 'item_num'],
         ]
-        
+
 class BlindBoxResult(object):
-    
+
     def __init__(self):
         self.fields = [
             ['item_id', 0, 'item_id'],
             ['item_num', 0, 'item_num'],
         ]
-        
+
 class InappPurchaseRecord(object):
     def __init__(self):
         self.fields = [
@@ -1239,4 +1239,4 @@ class InappPurchaseRecord(object):
             ['gameOrderId', '', '游戏订单id'],
             ['orderId', '', 'google订单id'],
             ['status', 0, '订单状态'],
-        ]
\ No newline at end of file
+        ]