fix dark code preview background when displaying long lines
fix dark code preview background when displaying long lines

Kambda/mobbr-gitlabhq,chadyred/gitlabhq,Devin001/gitlabhq,yama07/gitlabhq,DanielZhangQingLong/gitlabhq,neiljbrookes/glab,liyakun/gitlabhq,akumetsuv/gitlab,rumpelsepp/gitlabhq,sideci-sample/sideci-sample-gitlabhq,gopeter/gitlabhq,iiet/iiet-git,rebecamendez/gitlabhq,koreamic/gitlabhq,lvfeng1130/gitlabhq,Razer6/gitlabhq,fearenales/gitlabhq,SVArago/gitlabhq,cinderblock/gitlabhq,yatish27/gitlabhq,nguyen-tien-mulodo/gitlabhq,julianengel/gitlabhq,123Haynes/gitlabhq,bbodenmiller/gitlabhq,shinexiao/gitlabhq,dvrylc/gitlabhq,ikappas/gitlabhq,yama07/gitlabhq,OlegGirko/gitlab-ce,MauriceMohlek/gitlabhq,youprofit/gitlabhq,tim-hoff/gitlabhq,luzhongyang/gitlabhq,goeun/myRepo,sue445/gitlabhq,michaKFromParis/gitlabhq,larryli/gitlabhq,Soullivaneuh/gitlabhq,axilleas/gitlabhq,fantasywind/gitlabhq,dukex/gitlabhq,dukex/gitlabhq,hacsoc/gitlabhq,lbt/gitlabhq,zrbsprite/gitlabhq,it33/gitlabhq,TheWatcher/gitlabhq,ksoichiro/gitlabhq,t-zuehlsdorff/gitlabhq,per-garden/gitlabhq,jvanbaarsen/gitlabhq,initiummedia/gitlabhq,stellamiranda/mobbr-gitlabhq,hq804116393/gitlabhq,yonglehou/gitlabhq,sideci-sample/sideci-sample-gitlabhq,Kambda/mobbr-gitlabhq,rebecamendez/gitlabhq,pupaxxo/gitlabhq,revaret/gitlabhq,fpgentil/gitlabhq,riyad/gitlabhq,jirutka/gitlabhq,H3Chief/gitlabhq,mavimo/gitlabhq,yonglehou/gitlabhq,screenpages/gitlabhq,michaKFromParis/gitlabhq,ayufan/gitlabhq,pupaxxo/gitlabhq,SVArago/gitlabhq,Exeia/gitlabhq,jairzh/gitlabhq-sfdc,gopeter/gitlabhq,theonlydoo/gitlabhq,goeun/myRepo,williamherry/gitlabhq,theonlydoo/gitlabhq,rumpelsepp/gitlabhq,Keystion/gitlabhq,michaKFromParis/gitlabhqold,8thcolor/rubyconfau2015-sadr,zrbsprite/gitlabhq,sakishum/gitlabhq,chenrui2014/gitlabhq,zrbsprite/gitlabhq,Datacom/gitlabhq,pkgr/gitlabhq,bigsurge/gitlabhq,atomaka/gitlabhq,copystudy/gitlabhq,martinma4/gitlabhq,DanielZhangQingLong/gitlabhq,kitech/gitlabhq,xuvw/gitlabhq,mmkassem/gitlabhq,bozaro/gitlabhq,mmkassem/gitlabhq,H3Chief/gitlabhq,childbamboo/gitlabhq,ordiychen/gitlabhq,WSDC-NITWarangal/gitlabhq,Burick/gitlabhq,nmav/gitlabhq,fearenales/gitlabhq,mavimo/gitlabhq,bozaro/gitlabhq,darkrasid/gitlabhq,initiummedia/gitlabhq,theodi/gitlabhq,mathstuf/gitlabhq,htve/GitlabForChinese,nmav/gitlabhq,gorgee/gitlabhq,SkyWei/gitlabhq,dwrensha/gitlabhq,dukex/gitlabhq,martijnvermaat/gitlabhq,fscherwi/gitlabhq,8thcolor/testing-public-gitlabhq,NuLL3rr0r/gitlabhq,childbamboo/gitlabhq,tempbottle/gitlabhq,Datacom/gitlabhq,windymid/test2,inetfuture/gitlab-tweak,allysonbarros/gitlabhq,sonalkr132/gitlabhq,jrjang/gitlab-ce,chrrrles/nodeflab,yfaizal/gitlabhq,folpindo/gitlabhq,stanhu/gitlabhq,dyon/gitlab,copystudy/gitlabhq,Datacom/gitlabhq,dyon/gitlab,Exeia/gitlabhq,rfeese/gitlab-ce,jaepyoung/gitlabhq,pupaxxo/gitlabhq,rebecamendez/gitlabhq,0x20h/gitlabhq,adaiguoguo/gitlab_globalserarch,since2014/gitlabhq,rfeese/gitlab-ce,salipro4ever/gitlabhq,icedwater/gitlabhq,aaronsnyder/gitlabhq,LytayTOUCH/gitlabhq,folpindo/gitlabhq,LUMC/gitlabhq,chrrrles/nodeflab,123Haynes/gitlabhq,Soullivaneuh/gitlabhq,aaronsnyder/gitlabhq,icedwater/gitlabhq,pulkit21/gitlabhq,OlegGirko/gitlab-ce,rfeese/gitlab-ce,bozaro/gitlabhq,youprofit/gitlabhq,bigsurge/gitlabhq,k4zzk/gitlabhq,NARKOZ/gitlabhq,OtkurBiz/gitlabhq,rfeese/gitlab-ce,riyad/gitlabhq,achako/gitlabhq,wangcan2014/gitlabhq,whluwit/gitlabhq,jaepyoung/gitlabhq,allistera/gitlabhq,8thcolor/testing-public-gitlabhq,yama07/gitlabhq,openwide-java/gitlabhq,tempbottle/gitlabhq,duduribeiro/gitlabhq,flashbuckets/gitlabhq,ordiychen/gitlabhq,koreamic/gitlabhq,ayufan/gitlabhq,8thcolor/rubyconfau2015-sadr,hzy001/gitlabhq,OtkurBiz/gitlabhq,NKMR6194/gitlabhq,fgbreel/gitlabhq,ikappas/gitlabhq,ikappas/gitlabhq,salipro4ever/gitlabhq,rhels/gitlabhq,achako/gitlabhq,per-garden/gitlabhq,delkyd/gitlabhq,bbodenmiller/gitlabhq,wangcan2014/gitlabhq,TheWatcher/gitlabhq,t-zuehlsdorff/gitlabhq,ttasanen/gitlabhq,chadyred/gitlabhq,mente/gitlabhq,htve/GitlabForChinese,vjustov/gitlabhq,rhels/gitlabhq,CodeCantor/gitlabhq,gorgee/gitlabhq,kotaro-dev/gitlab-6-9,mavimo/gitlabhq,screenpages/gitlabhq,neiljbrookes/glab,zBMNForks/gitlabhq,sonalkr132/gitlabhq,martinma4/gitlabhq,luzhongyang/gitlabhq,sakishum/gitlabhq,gorgee/gitlabhq,sonalkr132/gitlabhq,joalmeid/gitlabhq,Kambda/Mobbr,chenrui2014/gitlabhq,williamherry/gitlabhq,htve/GitlabForChinese,mente/gitlabhq,dreampet/gitlab,screenpages/gitlabhq,DanielZhangQingLong/gitlabhq,bbodenmiller/gitlabhq,martinma4/gitlabhq,daiyu/gitlab-zh,8thcolor/eurucamp2014-htdsadr,yuyue2013/ss,LytayTOUCH/gitlabhq,wangcan2014/gitlabhq,mr-dxdy/gitlabhq,daiyu/gitlab-zh,theodi/gitlabhq,LUMC/gitlabhq,fpgentil/gitlabhq,theodi/gitlabhq,Burick/gitlabhq,atomaka/gitlabhq,dwrensha/gitlabhq,pulkit21/gitlabhq,it33/gitlabhq,fgbreel/gitlabhq,dplarson/gitlabhq,sekcheong/gitlabhq,per-garden/gitlabhq,dwrensha/gitlabhq,adaiguoguo/gitlab_globalserarch,manfer/gitlabhq,H3Chief/gitlabhq,zBMNForks/gitlabhq,betabot7/gitlabhq,Keystion/gitlabhq,Tyrael/gitlabhq,openwide-java/gitlabhq,tempbottle/gitlabhq,Burick/gitlabhq,NKMR6194/gitlabhq,bladealslayer/gitlabhq,dvrylc/gitlabhq,ferdinandrosario/gitlabh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