style: fix formatting oddities and bugs This will also align the formatting of the stylesheet with the indentation that a less-compiled version of this stylesheet would use. This will allow easier comparison of the original and less-generated stylesheet in future commits.

# requirements.txt file for use as "pip install -r requirements.txt" as a
# readthedocs compatible alternative to "pip install -e ." which is a working
# alternative to "setup.py develop" which doesn't work with Mercurial 3.7
.