Follow updated PEP8 with regard to line breaks and binary operators

We need to explicitly silence "W503 line break after binary operator"
because if we explicitly ignore *any* error code flake8 will report both
"W503 line break before binary operator" and "W504 line break after
binary operator" and that's not ideal.

Author: jstasiak

flask_injector.py

@@ -100,9 +100,9 @@ def wrap_class_based_view(fun: Callable, injector: Injector) -> Callable:
         assert not class_args, 'Class args are not supported, use kwargs instead'
 
     if (
-        flask_restful_api and
-        flask_restplus and
-        isinstance(flask_restful_api, flask_restplus.Api)
+        flask_restful_api
+        and flask_restplus
+        and isinstance(flask_restful_api, flask_restplus.Api)
     ):
         # This is flask_restplus' add_resource implementation:
         #

setup.cfg

@@ -7,4 +7,4 @@ tag_svn_revision = 0
 universal = 1
 
 [flake8]
-ignore = E741
+ignore = E741,W503