Add the ability to build docs using Python 3.
Review Request #10612 — Created June 30, 2019 and submitted
Up until now, in order to build docs, we required Python 2. This wasn't
be any decision -- we just had syntax errors and string type issues in
This change fixes up those small issues, letting us fully build docs
successfully on both Python 2 and 3. It also brings the configuration
up to current standards, using the correct author, copyright, and theme
Built all the docs using Python 2 and 3. Verified that they built