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


Former-commit-id: fb3fb9d91d082aed42be1de841713d50800a40b2 [formerly b8f062a16a64ea6944d4b8eeaeac6f0ff6195f22]
Former-commit-id: fd1f1d020b6193f3c7793fb1a1b28053c7d63325
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine