readthedocs fixes

[scrasmussen]

readthedocs is failing to build. These changes allowed it to build locally, testing to see if it will fix the online version

[pep8speaks]

Hello @scrasmussen! Thanks for opening this PR.

• In the file doc/conf.py:

Line 52:54: W291 trailing whitespace
Line 56:1: E265 block comment should start with '# '
Line 57:1: E265 block comment should start with '# '
Line 58:1: E265 block comment should start with '# '
Line 59:1: E265 block comment should start with '# '
Line 60:1: E265 block comment should start with '# '
Line 60:101: E501 line too long (244 > 100 characters)
Line 61:1: E265 block comment should start with '# '
Line 63:1: E265 block comment should start with '# '

Local linting (style checking) can be peformed using pycodestyle General guidelines can be found at the Hitchhiker's guide to code style