formats:
    - htmlzip
python:
    version: 3
    pip_install: true
    extra_requirements:
        - docs

formats:
    - htmlzip
    - pdf
python:
    version: 3
    pip_install: true
    extra_requirements:
        - docs

Revert "Revert "Try to enable pdf on RTFD""
Revert "Revert "Try to enable pdf on RTFD""

This reverts commit d37743d8f155953ae26ed5343233d6d9b1a6e3a5.
