Fixed a docstring
Fixed a docstring


Former-commit-id: c8e6ef7bf0670dabcb811da6cf3c70d8e57a65a3 [formerly bf7ce6713114ebdcf978abb5bd6bfc76093bcea8]
Former-commit-id: 830c704e75922fa20988957cf899ed9733cef711
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine