Miscellaneous docs fixes

[btjanaka]

Description

Misc fixes to docs.

TODO

• [x] Install all in addition to dev in CONTRIBUTING so that tests pass
• [x] Fix PR format for a line in HISTORY.md

Questions

Status

• [x] I have read the guidelines in CONTRIBUTING.md
• [x] I have formatted my code using yapf
• [x] I have tested my code by running pytest
• [x] I have linted my code with pylint
• [N/A] I have added a one-line description of my change to the changelog in HISTORY.md
• [x] This PR is ready to go