Bump hacking to 3.0.0
The new version enables a lot of standard flake8 checks, so a few
fixes are required. W503 is disabled as it conflicts with W504
and the latter seems to be preferred nowadays.
Change-Id: I3b1e20193a2cb3d28046ad0f2008577a95aaaefd
diff --git a/tox.ini b/tox.ini
index 60be8ec..8e64c37 100644
--- a/tox.ini
+++ b/tox.ini
@@ -36,7 +36,9 @@
commands = oslo_debug_helper {posargs}
[flake8]
-ignore = E129
+# [E129] Visually indented line with same indent as next logical line.
+# [W503] Line break occurred before a binary operator. Conflicts with W504.
+ignore = E129,W503
show-source = True
builtins = _