message: chore(api): Clean docs before building
  Sphinx doesn't pick up on changes made to docstrings that are captured with
  autodoc, so force clear the docs build dirs to  make it see them.
diff: @@ -86,12 +86,15 @@ lint: $(ot_py_sources)
  .PHONY: docs docs-html docs-doctest docs-pdf
  docs-html: local-install
  + shx rm -rf docs/build/html
  pipenv run sphinx-build -b html -d docs/build/doctrees docs/source docs/build/html
  docs-doctest: local-install
  + shx rm -rf docs/build/doctest
  pipenv run sphinx-build -b doctest -d docs/build/doctrees docs/source docs/build/doctest
  docs-pdf: local-install
  + -shx rm -rf docs/build/pdf
  -pipenv run sphinx-build -b latex -d docs/build/doctrees docs/source docs/build/pdf
  -$(MAKE) -C docs/build/pdf all-pdf
  