Parameter name "a_string" was mistaken and function
name "assert_is_json" was less clear than ideal,
given that it explicitly needs bytes unlike json.loads .
Format with line length 110 to match flake8
make black part of linting check
Update travis spec for updated black requirements
Add diff output for black on failure
update changelog
I wasn't emulating the stateful file-object in my response stub,
so urllib3 wasn't decompressing gzipped bodies properly. This
should fix that problem.
Thanks @bryanhelmig for the motivation to dig into this.
