Fix spelling across documentation

[chmouel]

• Make sure we initialize the fake kube client
• spelling and formatting fixes in documentation

Changes

Submitter Checklist

• ♽ Run make test lint before submitting a PR (ie: via pre-push github hook no need to waste CPU cycle on CI
• 📖 If you are adding a user facing feature or make a change of the behavior, please make sure to document it
• 🧪 100% coverage is not a target but most of the time we would rather have a unit test if you make a code change.
• 🎁 If that's something that is possible to do please make sure to check if we can add a e2e test.
• 🔎 If there is a flakiness in the CI tests then make sure to get the flakyness fixed before merging or if that's not possible there is a good reason to bypass it.

See the developer guide for a bit more details.

[chmouel]

/retest