add more advanced lookaround tests
add more advanced lookaround tests

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