Follow isort formatting

issue10928

.isort.cfg

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

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):

tests/test_marketing.py

@@ -3,7 +3,6 @@
 
 import unittest
 
-
 from trytond.tests.test_tryton import ModuleTestCase
 from trytond.tests.test_tryton import suite as test_suite