Consistency fixes for examples in documentation blocks

See the individual commits for what (and how it) has been done.

I have some further things in mind like:
  * Ensure each `Example:` or `CLI Example:` has an empty line before and after it
  * Ensure the `.. code-block` statement the same indentation as the previous line

Will create a new PR once I get around to take care of these further items. Feel free to review + merge this one for now.