update diff into comment as trace for release manual changes
update diff into comment as trace for release manual changes


Former-commit-id: 79caca2d5c24540931c49e36b5c63cc3b6c16bcd [formerly 09b01336a4510e0172071d2c68d768f1c5248038]
Former-commit-id: 9c3ea92ecbb529121c418bcb582ffe196dbbb4ef
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine