command-line: fix typo in docs
command-line: fix typo in docs

mrjbq7/factor,nicolas-p/factor,slavapestov/factor,factor/factor,bjourne/factor,bpollack/factor,mrjbq7/factor,dch/factor,sarvex/factor-lang,AlexIljin/factor,tgunr/factor,AlexIljin/factor,nicolas-p/factor,factor/factor,tgunr/factor,mrjbq7/factor,sarvex/factor-lang,bpollack/factor,sarvex/factor-lang,factor/factor,slavapestov/factor,AlexIljin/factor,bpollack/factor,nicolas-p/factor,factor/factor,bjourne/factor,sarvex/factor-lang,mrjbq7/factor,mrjbq7/factor,dch/factor,bjourne/factor,bpollack/factor,bpollack/factor,nicolas-p/factor,factor/factor,slavapestov/factor,AlexIljin/factor,slavapestov/factor,sarvex/factor-lang,dch/factor,slavapestov/factor,tgunr/factor,bpollack/factor,tgunr/factor,bjourne/factor,nicolas-p/factor,dch/factor,bjourne/factor,AlexIljin/factor,bjourne/factor,slavapestov/factor,tgunr/factor,sarvex/factor-lang,nicolas-p/factor,tgunr/factor,factor/factor,bjourne/factor,bpollack/factor,AlexIljin/factor,dch/factor,dch/factor,mrjbq7/factor,slavapestov/factor,sarvex/factor-lang,nicolas-p/factor,AlexIljin/factor