More doc fixes
More doc fixes


Former-commit-id: 55257bdaf5ecb700a106b13f3c49183ec0e47b92 [formerly af2c4bf18ba16891402ca6c6370b56a0b02a11a8]
Former-commit-id: cdf5a484934f78bb44bc93983ed458484e4faed8
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine