Ignore conflicting pycodestyle rules with pep8.

.gitlab-ci.yml

@@ -11,4 +11,6 @@ pycodestyle:
     # Ignored errors:
     # - E501: line too long
     # - E731: do not assign a lambda expression, use a def
-    - pycodestyle --ignore=E501,E731 .
+    # - W504: line break after binary operator (conflicts with old pep8 package)
+    # - W505: doc line too long
+    - pycodestyle --ignore=E501,E731,W504,W505 .