Fixed docstring [skip CI]
Fixed docstring [skip CI]


Former-commit-id: 0b4b0938293b198451224ce649d2dd62ee9248ce [formerly 7d504c2b715c003fc8c03d41d3f774718403cb58]
Former-commit-id: dd27649ddc06df5454fddd87e0c0ce3a0530c576
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine