see https://www.flake8rules.com/rules/W503.html

previously the best practice for python was to put a linebreak after a binary operator, but going forward pep8 wants a linebreak before a binary operator. It's explained in the link above. There are errors for both of these cases, and previously they were both enabled... I disable this one because it's going against pep8

so to be clear: in our code going forward linebreaks need to be placed BEFORE binary operators