Fixed Lexer#Lookahead() bug
Fixed Lexer#Lookahead() bug

fusesource/coffeejade,coderhaoxin/jade,angrilove/jade,pugjs/jade,derbyparty/derby-jade,ceremcem/jade,andreytkachenko/jade,mumaoxi/jade,gexiaowei/jade,Mitrend/jade,VANITAX/jade,timmfin/jade,cgvarela/jade,Mitrend/jade,martindale/jade,magicdawn/jade,cgvarela/jade,pugjs/jade,Laoujin/jade,pugjs/pug,jirengu/jade,VeraWei/jade,illusionfield/jade,fredyteheranto/jade,rajnishyadav321/jade,hnag409/jade,gdibble/jade,jodytate/jade,jodytate/jade,modulexcite/jade,jjz/jade,cesarmarinhorj/jade,mumaoxi/jade,Victorgichohi/jade,tranhieutt/jade,cutsin/jade,cesarmarinhorj/jade,Laoujin/jade,webskyer/jade,webmasteraxe/jade,Shinchy/jade,rajnishyadav321/jade,ddopson/jade-coffeescript,webskyer/jade,bogus34/jade-vfs,pugjs/then-jade,gexiaowei/jade,colin-h/jade,omixen/jade,Shinchy/jade,andreytkachenko/jade,wavii/jade,Victorgichohi/jade,harp/jade,jadejs/then-jade,tranhieutt/jade,muthhus/jade,mrotaru/jade,ridixcr/jade,rauchg/jade,flintinatux/jade,magicdawn/jade,ilovezy/jade,bogus34/jade-vfs,illusionfield/jade,webmasteraxe/jade,derbyparty/derby-jade,slang800/yade,jjz/jade,ridixcr/jade,martindale/jade,modulexcite/jade,gdibble/jade,angryrobot/jade,nyakto/jade-async,jadejs/then-jade,angrilove/jade,VeraWei/jade,pugjs/then-jade,jirengu/jade,mrotaru/jade,angryrobot/jade,hnag409/jade,omixen/jade,muthhus/jade,fredyteheranto/jade,harp/jade,ilovezy/jade,colin-h/jade,pugjs/pug,cutsin/jade,coderhaoxin/jade,nyakto/jade-async,ddopson/jade-coffeescript,VANITAX/jade