little pep8 fixes
little pep8 fixes


Former-commit-id: 6c4afea20b53b59adaf35fcb58262364b8e08ee9 [formerly 6c4afea20b53b59adaf35fcb58262364b8e08ee9 [formerly 8efa0c3190e4ea1f272b70f66eb7b0cad7757ee2]]
Former-commit-id: 201a69fa1e12f4e0faaf61b70f2952d60e6c59d7
Former-commit-id: 970402a079f8180146d05629cebd77d94bce444b
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine