- `gettext_uuid=True` makes every commit update every .pot file in spack/localized-docs, and speeds up the internationalized doc build slightly. - Optimize for less repository churn, and use `python-levenshtein` to accelerate the build instead.
Later versions of Sphinx fail due to possible clashes with our custom argparse.
* Move doc dependencies to requirements.txt for readthedocs * Move sphinx to doc requirements.
