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


Former-commit-id: 19acac1ca7c6c5217bd52a6424af02025cf10964 [formerly 9302521d624377e38890d1900b9d3fd8fab3142e]
Former-commit-id: e1f5534054755426105aad0fe45944ca3b31c9e7
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine