Minor pep8 fixes
Minor pep8 fixes


Former-commit-id: 8350d4e8c893ce8f559a638686bd58220b51d8b5 [formerly b01b35397fb14b3a2881bf59c70dd70ffda768a3]
Former-commit-id: e9e31db378489c2067465f88f7515dcccdb2f1d9
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine