CFG: Ignore W503

TomAugspurger · TomAugspurger · commit 64e565ad3f3a · 2017-12-11T20:37:17.000-06:00
Partial backport of https://github.com/pandas-dev/pandas/pull/18046/files
diff --git a/setup.cfg b/setup.cfg
@@ -12,7 +12,7 @@ tag_prefix = v
 parentdir_prefix = pandas-
 
 [flake8]
-ignore = E731,E402
+ignore = E731,E402,W503
 max-line-length = 79
 
 [yapf]
