Some improvements to reportwriter.count_ruptures [skip CI]
Some improvements to reportwriter.count_ruptures [skip CI]


Former-commit-id: 1ebf41b1152102235def2820a880424b560b6101 [formerly 83ed607e90f04abcf5fd3c47d423b57931ba2aba]
Former-commit-id: 25a11a5fc87e88a7ab652e079a04f0a2efdb62dd
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine