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


Former-commit-id: 3c2393588eeeb7b5acaac940c88141fdebedaa38 [formerly dc6113986b1778cc16e7f0d76730853f64e19f60]
Former-commit-id: 3ad0fbbc786098bcbfe3b93a87a943c65d5313e7
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine