splitting.monotonic: cleanup, a little faster.
splitting.monotonic: cleanup, a little faster.

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