Adjust flake8 max-line-length to 88 in anticipation of #1644

Author: akx

tox.ini

@@ -130,7 +130,7 @@ commands = /usr/bin/echo
 deps_files = dev_requirements.txt
 docker =
 commands =
-    flake8
+    flake8 --max-line-length=88
     vulture redis whitelist.py --min-confidence 80
 skipsdist = true
 skip_install = true