diff --git a/contract_sale_generation/models/account_analytic_account.py b/contract_sale_generation/models/account_analytic_account.py
index c84767a3..2ff3599c 100644
--- a/contract_sale_generation/models/account_analytic_account.py
+++ b/contract_sale_generation/models/account_analytic_account.py
@@ -59,7 +59,7 @@ class AccountAnalyticAccount(models.Model):
 
     @api.multi
     def _create_invoice(self):
-        """ 
+        """
         Create invoices
         @param None
         @return: MUST return an invoice recordset
@@ -72,7 +72,7 @@ class AccountAnalyticAccount(models.Model):
 
     @api.multi
     def _create_sale(self):
-        """ 
+        """
         Create Sale orders
         @param None
         @return: MUST return a sale.order recordset