INFO1("| maxiter.............: %u", opt::maxiter);
INFO1("| exit on close.......: %s", on_off(opt::exit_on_close));
INFO1("| bookkeeping.........: %s", on_off(opt::bookkeeping));
INFO1("| maxiter.............: %u", opt::maxiter);
INFO1("| exit on close.......: %s", on_off(opt::exit_on_close));
INFO1("| bookkeeping.........: %s", on_off(opt::bookkeeping));