Noissue - Switch to binary operator after line break standard following PEP8 and Flake8

tests/test_additional_paths.py

 # This file is part of the Adblock Plus web scripts,
 # Copyright (C) 2006-present eyeo GmbH
 #
 # Adblock Plus is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 3 as
 # published by the Free Software Foundation.
 #
 # Adblock Plus is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
@@ skipping 34 matching lines @@
 
 
 @pytest.fixture(scope='session')
 def ap_site(temp_site, tmpdir_factory):
     """A website source that has another website in additional-paths."""
     base_root = py.path.local(temp_site)
     base_pages = base_root.join('pages')
 
     ap_root = tmpdir_factory.mktemp('ap_site')
     ap_root.join('settings.ini').write(
-        base_root.join('settings.ini').read() +
-        PATHS_FRAGMENT_TEMPLATE.format(base_root),
+        base_root.join('settings.ini').read()
+        + PATHS_FRAGMENT_TEMPLATE.format(base_root),
     )
 
     pages = ap_root.mkdir('pages')
     for file_name in ['filter.tmpl', 'global.md', 'translate.tmpl']:
         pages.join(file_name).write('MAIN_SITE')
     pages.join('map.tmpl').write(base_pages.join('sitemap.tmpl').read())
     return ap_root
 
 
 @pytest.fixture(scope='session')
@@ skipping 42 matching lines @@
     three.join('three').write('')
     three.join('settings.ini').write('')
 
     four.join('four').write('')
     four.join('settings.ini').write('[paths]')
 
     source = create_source(one.strpath)
 
     for name in ['one', 'two', 'three', 'four']:
         assert source.has_file(name)