Turns out, PBR won't generate the ChangeLog without an explicit
install/build after all, or at least not in the way which tox is
handling it. This slipped through testing due to not running in a
clean tree.
This reverts commit
70381626690da47866363ef51ef8a37a4831dffa.
-r{toxinidir}/doc/requirements.txt
commands =
rm -fr doc/build
+ python setup.py sdist
sphinx-build -W -d doc/build/doctrees -b html doc/source/ doc/build/html
usedevelop = False