Remove trailing whitespace.
Remove trailing whitespace.


Former-commit-id: ff0e5f51a9bd6de753917d19dc3ab8eff9860792 [formerly 5f8355345ee8ce022fc84c58a99a0d3a2c8e20eb]
Former-commit-id: 7571414915dc230023de849ddf3da1b2e77bffe6
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine