This change mainly fixes incorrect use of backticks
but also adress some other minor issues like unbalanced
backticks, incorrect spacing or missing _ in links.
This change add a tox target to run sphinx-lint
as well as adding it to the relevent tox envs to enforce
it in ci. pre-commit is leveraged to install and execute
sphinx-lint but it does not reqiure you to install the
hooks locally into your working dir.
Change-Id: Ib97b35c9014bc31876003cef4362c47a8a3a4e0e
33a56781f4