Fixed a docstring
Fixed a docstring


Former-commit-id: 4cc18721c5704ece9caec0ae5d9f4a16fff70a88 [formerly a391c0beda21c91fdd1e1d72fa9c67a7bf4941d6]
Former-commit-id: 393270e0ae59749ec95b5cf15df8001a26bc1b98
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine