Fixed a docstring
Fixed a docstring


Former-commit-id: b1dcbddf8be18a6697eea56d1fc4a08138bb33da [formerly caff3c217b43b737f27c69812bdeeb0bcac42528] [formerly caff3c217b43b737f27c69812bdeeb0bcac42528 [formerly fb449d8cdd598bf97211b40375988d5b73ef0c9c]]
Former-commit-id: 0ba6dd8491269115cad9db97cdce15f021e4308a
Former-commit-id: 8d3a1be7b617d386119aa6188c0ab22308206ead
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine