Fixed a docstring
Fixed a docstring


Former-commit-id: c484553d9c272a5b7a941c793da48a438799a8a6 [formerly 93a4ec98b22c3c9e8b64141d8caa1397f4eb3db2]
Former-commit-id: 98f9013af5dd336444c7f34f39fce677675486f5
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine