===== error =====
fg: `--no-such-option' is not a valid option
fg: no such job `%100'
fg: no such job `%no_such_job'
fg: too many operands are specified
fg: job control is disabled
bg: `--no-such-option' is not a valid option
bg: no such job `%100'
bg: no such job `%no_such_job'
bg: job control is disabled
