io.streams.256color: adding a "256color-terminal?" word and minor cleanup.
io.streams.256color: adding a "256color-terminal?" word and minor cleanup.

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