Small changes to development.md [skip ci]
Small changes to development.md [skip ci]


Former-commit-id: ef82c8a08937a22fc614a596851e34e10937e366 [formerly 54ac816785fc8a7cd86fe9a3723fbcfc1796512d]
Former-commit-id: 4c5ac8e573f46dd8f9a8f7bc2e6b212821417d56
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine