When we switched to logv2, our log lines were converted via perl script. Let's go through and make them more readable and parseable. The following files might need attention:
src/mongo/db/commands.cpp src/mongo/db/curop.cpp src/mongo/db/db.cpp src/mongo/db/initialize_server_global_state.cpp src/mongo/db/log_process_details.cpp src/mongo/db/logical_session_cache_impl.cpp src/mongo/db/mirror_maestro.cpp src/mongo/db/mongod_options.cpp src/mongo/db/operation_context.cpp src/mongo/db/operation_key_manager.cpp src/mongo/db/operation_killer.cpp src/mongo/db/server_options_server_helpers.cpp src/mongo/db/service_context.cpp src/mongo/db/service_entry_point_common.cpp src/mongo/db/service_entry_point_mongod.cpp src/mongo/db/startup_warnings_common.cpp src/mongo/db/startup_warnings_mongod.cpp