add a unit test to io.paths
add a unit test to io.paths

factor/factor,littledan/Factor,bpollack/factor,bjourne/factor,seckar/factor,sarvex/factor-lang,slavapestov/factor,AlexIljin/factor,kingcons/factor,erg/factor,AlexIljin/factor,littledan/Factor,nicolas-p/factor,kingcons/factor,bpollack/factor,nicolas-p/factor,AlexIljin/factor,seckar/factor,sarvex/factor-lang,mrjbq7/factor,kingcons/factor,nicolas-p/factor,mcandre/factor,seckar/factor,tgunr/factor,bjourne/factor,ceninan/factor,sarvex/factor-lang,bpollack/factor,slavapestov/factor,factor/factor,dharmatech/factor,mrjbq7/factor,mrjbq7/factor,tgunr/factor,erg/factor,jwmerrill/factor,ceninan/factor,bjourne/factor,mcandre/factor,sarvex/factor-lang,tgunr/factor,AlexIljin/factor,dch/factor,tgunr/factor,sarvex/factor-lang,jwmerrill/factor,littledan/Factor,bpollack/factor,dch/factor,mcandre/factor,dch/factor,ehird/factor,nicolas-p/factor,cataska/factor,dch/factor,ehird/factor,ehird/factor,cataska/factor,Keyholder/factor,ceninan/factor,cataska/factor,erg/factor,Keyholder/factor,erg/factor,littledan/Factor,mcandre/factor,cataska/factor,tgunr/factor,slavapestov/factor,erg/factor,bjourne/factor,bjourne/factor,dharmatech/factor,factor/factor,dharmatech/factor,tgunr/factor,mcandre/factor,bjourne/factor,erg/factor,mcandre/factor,sarvex/factor-lang,mrjbq7/factor,nicolas-p/factor,mcandre/factor,slavapestov/factor,dch/factor,ceninan/factor,bpollack/factor,factor/factor,AlexIljin/factor,Keyholder/factor,erg/factor,slavapestov/factor,bpollack/factor,sarvex/factor-lang,bjourne/factor,AlexIljin/factor,mrjbq7/factor,mrjbq7/factor,kingcons/factor,slavapestov/factor,jwmerrill/factor,nicolas-p/factor,AlexIljin/factor,bpollack/factor,slavapestov/factor,dch/factor,nicolas-p/factor,factor/factor,factor/factor