Encoding parameter to json.loads is deprecated and will be removed in Python 3.9

[tirkarthi]

Some of the tests in test_gateway have encoding parameter passed to json.loads. This is ignored and deprecated to be removed in Python 3.9.

>>> json.loads(json.dumps({1: 1}), encoding='utf-8')
<stdin>:1: DeprecationWarning: 'encoding' is ignored and deprecated. It will be removed in Python 3.9
{'1': 1}

notebook/notebook/tests/test_gateway.py

Line 189 in 7b5248d

kspec_foo = json.loads(response.content.decode('utf-8'), encoding='utf-8')

[kevin-bates]

Agreed. Did you want to provide a pull request for this?