Fixed a docstring
Fixed a docstring


Former-commit-id: 842714974a3605998231864120091811b9cafaa3 [formerly 47f2a6688a5f111f1faf8c2852161f22cef41754]
Former-commit-id: 4206a61e20bd8b43ac1eefbe19a57ec99b71fded
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine