ntome authored May 26, 2020 and hydrargyrum committed Jun 17, 2020

Passing data='' or json={} to browser methods like open() or build_request()
used to make a GET, but this is incorrect.

We can simply check the non-None of one of those params.
If a Request parameter is used though, it's more implicit, because we cannot
guess what was the intention, we can't easily distinguish the default value from
an intentionally empty value

    Request().data == []
    Request().json is None