fix comments
fix comments


Former-commit-id: 6419b2c0e1f81ae141218d57cf497d5f62856b57 [formerly e2d29d42f1547ad72c8e39410af5b1a3cc746330]
Former-commit-id: 8fc8cae618fe4beae406e1c6ef8de035566540b3
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine