Added interpolation tests
Added interpolation tests

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