Fixed a doctest
Fixed a doctest


Former-commit-id: b7eaf3d401b3590152763388e233c17146844f2d [formerly b7eaf3d401b3590152763388e233c17146844f2d [formerly b0cafdf6098b71beda86a249b184d54d08080751]]
Former-commit-id: 79f5166655a752c0cc50b4edc463cb595d432328
Former-commit-id: aa1c873a358b6188d7dda027236403fd0a07313d
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine