simplify sed detection
simplify sed detection

liyanchang/buildbot-master-buildpack,evnpr/herokupython,sookasa/heroku-buildpack-python-pipeline,dbrgn/heroku-npscipy,brightforme/heroku-buildpack-python,jms6520/cf-python,ianyh/heroku-buildpack-python-opencv,aldryn/heroku-buildpack-python,wbrefvem/heroku-buildpack-python,blazekadam/opencv,dubsmash/heroku-buildpack-python,cloudControl/buildpack-python,joshisa/python-buildpack,osharim/-heroku-buildpack-python,Mause/heroku-buildpack-python,drinks/heroku-buildpack-python-scipy,PerceptumNL/heroku-buildpack-python,econchick/heroku-buildpack-python,ianyh/heroku-buildpack-python-bower,rollokb/heroku-buildpack-python,Apogaea/heroku-buildpack-python,cirlabs/heroku-buildpack-geodjango,Stibbons/heroku-buildpack-python-installer,blazekadam/open2,benslavin/heroku-buildpack-python,kikin81/heroku-buildpack,pkumar-appd/python-buildpack,ianyh/heroku-buildpack-python-opencv,cloudfoundry/python-buildpack,doda/heroku-buildpack-python,pkumar-appd/python-buildpack,lucasvo/heroku-buildpack-python-with-node,samuelhavron/heroku-buildpack-python,slorg1/heroku-buildpack-python,lyft/heroku-buildpack-python-data,ad-m/heroku-buildpack-python,ghhong1986/crfpp-python-buildpack-for-heroku,vlidholt/heroku-buildpack-scipy,rajpurkar/heroku-buildpack-python-sklearn,grivescorbett/heroku-buildpack-python,18F/python-buildpack,drinks/heroku-buildpack-python-scipy,swanson/heroku-buildpack-python-ortools,SciDevs/heroku-buildpack-python-scikit-learn-git,mfenniak/heroku-buildpack-python-libffi,liyanchang/cloudfoundary-buildbot-buildpack,jamarparris/heroku-buildpack-python-swig,benjaminfox/heroku-buildpack-python-geoip,heroku/heroku-buildpack-python,HousekeepLtd/heroku-buildpack-python,samuelhavron/heroku-buildpack-python,markine/heroku-buildpack-python,integricho/heroku-buildpack-python-ffmpeg2.1-with-codecs,kikin81/heroku-buildpack,dbrgn/heroku-npscipy,Gliimpse/heroku-buildpack-SWIG-python,jms6520/cf-python,legnaleurc/heroku-buildpack-python,cortexintel/heroku-buildpack-scipy,SciDevs/heroku-buildpack-python-scikit-learn-git,uniphil/heroku-buildpack-pythonsass,uniphil/heroku-buildpack-pythonsass,wyn/heroku-buildpack-python,davidcbucher/heroku-buildpack-geo-python,ojacobson/heroku-buildpack-python,osharim/-heroku-buildpack-python,kennethjiang/heroku-buildpack-python-libffi,marcospy/hackathon-globo-app,tommyvn/heroku-buildpack-python,SciDevs/heroku-buildpack-python-scikit-learn-git,ianyh/heroku-buildpack-python-nodejs,drinks/heroku-buildpack-python-base,samuelhavron/heroku-buildpack-python,julienbou/heroku-buildpack-serpan,tukutela/heroku-buildpack-python,agriffis/heroku-buildpack-python,marcospy/hackathon-globo-app,rajpurkar/heroku-buildpack-python-sklearn,incuna/heroku-buildpack-python-test,jimlindeman/python-buildpack-collectd,ianyh/heroku-buildpack-python-nodejs,gaumire/heroku-buildpack-python,ianyh/heroku-buildpack-python-extras,mfenniak/heroku-buildpack-python-libffi,alexflanagan/operand-buildpack-python,oberlin/heroku-buildpack-python,aldryn/heroku-buildpack-python,film42/heroku-buildpack-python-wkhtmltopdf,econchick/heroku-buildpack-python,rawWhipIT/p22-goldant-buildpack,craigkerstiens/gistlog,legnaleurc/heroku-buildpack-python,jimlindeman/python-buildpack-collectd,jbenet/heroku-buildpack-python,legnaleurc/heroku-buildpack-python,arnfred/heroku-buildpack-python-hdf5-blas-lapack,incuna/heroku-buildpack-python-test,Nazanin84/python-buildpack,guidowb/buildpack-python,kennethjiang/heroku-buildpack-python-libffi,mythmon/heroku-buildpack-python-nodejs,WonderThink/heroku-buildpack-python-ffmpeg-geoip,marcospy/hackathon-globo-app,Gliimpse/heroku-buildpack-SWIG-python,jms6520/cf-python,apiaryio/heroku-buildpack-python-scons,pkumar-appd/python-buildpack,kennethjiang/heroku-buildpack-python-libffi,Scalingo/python-buildpack,ywarezk/heroku-buildpack-geodjango,nwkotto/geodjango-buildpack-with-geos,predata/heroku-buildpack-scipy,river-jade/heroku-buildpack-scipy,mjumbewu/heroku-buildpack-python-no-node,rawWhipIT/p22-goldant-buildpack,kennethreitz/sphinx-buildpack,evnpr/herokupython,econchick/heroku-buildpack-python,andrespires/python-buildpack,joshisa/python-buildpack,orablu/heroku-buildpack,craigkerstiens/gistlog,kvarga/heroku-buildpack-python,bobsilverberg/heroku-buildpack-python-peep,pmclanahan/heroku-buildpack-python-peep,jimlindeman/python-buildpack-collectd,miraculixx/heroku-buildpack-python,zakdoek/heroku-buildpack-django,arnfred/heroku-buildpack-python-hdf5-blas-lapack,loanzen/heroku-buildpack-python,Nazanin84/python-buildpack,drinks/heroku-buildpack-python-base,andela-brotich/wger-buildpack-python,Scalingo/python-buildpack,ekkleesia2/heroku-buildpack-python,aldryn/heroku-buildpack-python,nemesiscodex/heroku-buildpack-python,integricho/heroku-buildpack-python-ffmpeg-lame,kowito/python-buildpack,cirlabs/heroku-buildpack-geodjango,dvreed/heroku-buildpack-python-ldap,arnfred/heroku-buildpack-python-hdf5-blas-lapack,mjumbewu/heroku-buildpack-python-no-node,amanjain/heroku-buildpack-python-with-django-bower,rapilabs/heroku-buildpack-python,buildingenergy/heroku-buildpack-python-leatherman,marianzange/heroku-buildpack-python,samuelhavron/heroku-buildpack-python,projetoeureka/heroku-buildpack-scipy,martingascon/heroku-buildpack-python,cloudfoundry/python-buildpack,dbrgn/heroku-buildpack-python-sklearn,edmorley/heroku-buildpack-python,mdz/heroku-buildpack-python,benslavin/heroku-buildpack-python,guidowb/buildpack-python,jms6520/cf-python,minichate/heroku-buildpack-ldap,codeforamerica/heroku-buildpack-pygeo,drinks/heroku-buildpack-python-base,localmed/heroku-buildpack-python-extras,mdz/heroku-buildpack-python,nikita-pivovarov/heroku-buildpack-python-ldap,ruscoder/heroku-buildpack-python-with-node,chalkchisel/heroku-buildpack-bolster,cirlabs/heroku-buildpack-geodjango,mfenniak/heroku-buildpack-python-libffi,liyanchang/cloudfoundary-buildbot-buildpack,sookasa/heroku-buildpack-python-pipeline,kowito/python-buildpack,kikin81/heroku-buildpack,dbrgn/heroku-npscipy,cdht/heroku-buildpack-python,film42/heroku-buildpack-python-wkhtmltopdf,buildingenergy/heroku-buildpack-python-leatherman,Nazanin84/python-buildpack,igroff/heroku-buildpack-python,localmed/heroku-buildpack-python-extras,evnpr/herokupython,dbrgn/heroku-buildpack-python-sklearn,junyoed/heroku-buildpack-python,skilljar/heroku-buildpack-python,craigkerstiens/gistlog,18F/python-buildpack,wyn/heroku-buildpack-python,psrthegreat/heroku-buildpack-python-sklearn,YoApp/heroku-buildpack-python-twemproxy,smalleats/heroku-buildpack-python,lucasvo/heroku-buildpack-python-with-node,davidcbucher/heroku-buildpack-geo-python,alexluke/heroku-buildpack-python-extras,scrapinghub/scrapinghub-buildpack-scrapy,pwdel1/heroku-buildpack-scipy,everysignalinc/heroku-buildpack-python-scikit-learn-git,ruscoder/heroku-buildpack-python-with-node,maxcountryman/heroku-buildpack-python,lukaszkorecki/heroku-buildpack-python,xica/heroku-buildpack-scipy,evnpr/herokupython,edenspiekermann-amsterdam/heroku-buildpack-python,joshowen/heroku-buildpack-python,jbenet/heroku-buildpack-python,heroku/heroku-buildpack-python,film42/heroku-buildpack-python-wkhtmltopdf,integricho/heroku-buildpack-python-ffmpeg-lame,swils/heroku-buildpack-python,AltSchool/heroku-buildpack-python,stalnacke/heroku-buildpack-python,marcospy/heroku-buildpack-scipy,wyn/heroku-buildpack-python,Brogency/heroku-buildpack-python-gulp,bolster/heroku-buildpack-bolster,thenovices/heroku-buildpack-scipy,pebble/cloudpebble-buildpack,jbenet/heroku-buildpack-python,bolster/heroku-buildpack-bolster,mobify/heroku-buildpack-python-swig,osharim/-heroku-buildpack-python,guidowb/buildpack-python,rawWhipIT/p22-goldant-buildpack,davidcbucher/heroku-buildpack-geo-python,apiaryio/heroku-buildpack-python-scons,alexluke/heroku-buildpack-python-extras,liyanchang/cloudfoundary-buildbot-buildpack,jbenet/heroku-buildpack-python,andrespires/python-buildpack,samuelhavron/heroku-buildpack-python,brianthomas/heroku-buildpack-textmining,wbrefvem/heroku-buildpack-python,RobertSundling/heroku-buildpack-python-nginx,snapist/heroku-buildpack-python-opencv,beni55/heroku-buildpack-python,ryanhiebert/heroku-buildpack-python,galuszkak/heroku-buildpack-django,drinks/heroku-buildpack-python-scipy,soapril/heroku-buildpack-python,ianyh/heroku-buildpack-python-extras,rbtying/heroku-buildpack-python,kowito/python-buildpack,psrthegreat/heroku-buildpack-python-sklearn,drinks/heroku-buildpack-python-scipy,gitricko/apt-python-buildpack,HanSooloo/heroku-buildpack-python,jiaaro/heroku-buildpack-django,zakdoek/heroku-buildpack-django,craigkerstiens/gistlog,mjumbewu/heroku-buildpack-python-no-node,orablu/heroku-buildpack,adamroth/heroku-buildpack-python-pdftk,kikin81/heroku-buildpack,samuelhavron/heroku-buildpack-python,samuelhavron/heroku-buildpack-python,ephemerallabs/heroku-buildpack-python,apiaryio/heroku-buildpack-python-scons,joshfriend/heroku-buildpack-python,lucasvo/heroku-buildpack-python-with-node,jvenezia/heroku-buildpack-python,ruscoder/heroku-buildpack-python,DylanLukes/heroku-buildpack-python,doda/heroku-buildpack-python,benslavin/heroku-buildpack-python,18F/python-buildpack,benmurden/heroku-buildpack-python-ember,everysignalinc/heroku-buildpack-python-scikit-learn-git,lyft/heroku-buildpack-python-data,uniphil/heroku-buildpack-pythonsass,orablu/heroku-buildpack,ianyh/heroku-buildpack-python-extras,dbrgn/heroku-buildpack-python-sklearn,julienbou/heroku-buildpack-serpan,joshisa/python-buildpack,ad-m/heroku-buildpack-python,sookasa/heroku-buildpack-python-pipeline,drinks/heroku-buildpack-python-base,mdz/heroku-buildpack-python,buildbot/buildbot-master-buildpack,galuszkak/heroku-buildpack-django,resmio/heroku-buildpack-geodjango,Tiger66639/buildbot-master-buildpack,chalkchisel/heroku-buildpack-bolster,orablu/heroku-buildpack,dulaccc/heroku-buildpack-geodjango,cclauss/heroku-buildpack-python,sjtuadamyang/adamyang-buildpack-python-libjpeg,tukutela/heroku-buildpack-python,davidcbucher/heroku-buildpack-geo-python,psrthegreat/heroku-buildpack-python-sklearn,arnaudlimbourg/heroku-buildpack-python,minichate/heroku-buildpack-ldap,mtigas/heroku-buildpack-pypy,plangrid/heroku-buildpack-python,rajpurkar/heroku-buildpack-python-sklearn,ghhong1986/crfpp-python-buildpack-for-heroku,gitricko/apt-python-buildpack,incuna/heroku-buildpack-python-test,lyft/heroku-buildpack-python-data,andrespires/python-buildpack,samuelhavron/heroku-buildpack-python,codeforamerica/heroku-buildpack-pygeo,icoxfog417/heroku-buildpack-python,buildingenergy/heroku-buildpack-python-leatherman,ianyh/heroku-buildpack-python-opencv,papaeye/heroku-buildpack-python-bower,econchick/heroku-buildpack-python,hsr-ba-fs15-dat/heroku-buildpack,monological/heroku-buildpack-python-opencv,everysignalinc/heroku-buildpack-python-scikit-learn-git,blazekadam/opencv,boardman/sphinx-buildpack,benjaminfox/heroku-buildpack-python-geoip,jiaaro/heroku-buildpack-django,localmed/heroku-buildpack-python-extras,snapist/heroku-buildpack-python-opencv,driftyco/heroku-buildpack-sphinx,manufacturedba/heroku-buildpack-python,gitricko/apt-python-buildpack,galuszkak/heroku-buildpack-django,maciejgryka/heroku-buildpack-spcedge,cloudfoundry/python-buildpack,AltSchool/heroku-buildpack-python,alexflanagan/operand-buildpack-python,TipWander/heroku-buildpack-geodjango,benmurden/heroku-buildpack-python-ember,nadirizr/heroku-buildpack-python-gulp,nicktimko/heroku-buildpack-scipy,ianyh/heroku-buildpack-python-nodejs,Gliimpse/heroku-buildpack-SWIG-python,integricho/heroku-buildpack-python-ffmpeg-lame,mtigas/heroku-buildpack-pypy