Follow isort formatting

issue10928

.isort.cfg

@@ -0,0 +1,3 @@
+[settings]
+multi_line_output=4
+known_first_party=trytond

sale.py

@@ -3,11 +3,10 @@
 from decimal import Decimal
 
 from trytond.model import fields
-from trytond.pool import PoolMeta, Pool
-from trytond.pyson import Eval
-
 from trytond.modules.currency.fields import Monetary
 from trytond.modules.product import price_digits, round_price
+from trytond.pool import Pool, PoolMeta
+from trytond.pyson import Eval
 
 
 class Line(metaclass=PoolMeta):

setup.py

@@ -6,7 +6,8 @@ import io
 import os
 import re
 from configparser import ConfigParser
-from setuptools import setup, find_packages
+
+from setuptools import find_packages, setup
 
 
 def read(fname, slice=None):

tests/__init__.py

@@ -2,7 +2,8 @@
 # this repository contains the full copyright notices and license terms.
 
 try:
-    from trytond.modules.sale_discount.tests.test_sale_discount import suite  # noqa: E501
+    from trytond.modules.sale_discount.tests.test_sale_discount import \
+        suite  # noqa: E501
 except ImportError:
     from .test_sale_discount import suite
 

tests/test_sale_discount.py

@@ -1,14 +1,12 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 
+import doctest
 import unittest
 
-import doctest
-
-from trytond.tests.test_tryton import ModuleTestCase
+from trytond.tests.test_tryton import (
+    ModuleTestCase, doctest_checker, doctest_teardown)
 from trytond.tests.test_tryton import suite as test_suite
-from trytond.tests.test_tryton import doctest_teardown
-from trytond.tests.test_tryton import doctest_checker
 
 
 class SaleDiscountTestCase(ModuleTestCase):