making sure minikube is deleted before setup to avoid https://github.com/kubernetes/minikube/issues/4132

Changes addressed

Mostly related to whitespace (newlines / trailing),
lots of issues remaining to fix in the docs directory.

As usual linting takes most effort when you start,
but from there it is easier to keep code and docs clean.

Closes #3295

The documentation is clearer now for a person new to macOS.

Make it clear that for none, you must be running standard docker.