Fix string docs.
Fix string docs.

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