PEP8 inconsistencies fixed
PEP8 inconsistencies fixed


Former-commit-id: 51f01f1086b92674136a4cfe987a8856591e029c [formerly 51f01f1086b92674136a4cfe987a8856591e029c [formerly 6322f87113fab67c56c143bba1c7c7e97bc98f00]]
Former-commit-id: 40c844898cac65f77b08f3bd390968be6fc17a08
Former-commit-id: 6a9649cf644135b4b2679e4c5f53474fec74976e
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine