Better comments [skip CI]
Better comments [skip CI]


Former-commit-id: 173d5a711fac2d14bdbecdb130d2ba2fa208db9c [formerly 90848c650512fd0cc06d1dc856ea109ec92ff209]
Former-commit-id: e68ccec2430f6347dc6bf3ee9629974975fd97b0
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine