sequences-docs: fix a typo
sequences-docs: fix a typo

mrjbq7/factor,factor/factor,AlexIljin/factor,tgunr/factor,bpollack/factor,AlexIljin/factor,mrjbq7/factor,tgunr/factor,tgunr/factor,bpollack/factor,mrjbq7/factor,bpollack/factor,AlexIljin/factor,AlexIljin/factor,factor/factor,AlexIljin/factor,bpollack/factor,bpollack/factor,mrjbq7/factor,factor/factor,mrjbq7/factor,AlexIljin/factor,tgunr/factor,factor/factor,AlexIljin/factor,factor/factor,tgunr/factor,tgunr/factor,bpollack/factor,mrjbq7/factor,factor/factor,bpollack/factor