Skip the objectEnumerator in left folds
Skip the objectEnumerator in left folds

It's not going to make any difference when `self` is retained in the current scope.

terry408911/ReactiveCocoa,jianwoo/ReactiveCocoa,OnTheWay1988/ReactiveCocoa,cstars135/ReactiveCocoa,zzqiltw/ReactiveCocoa,calebd/ReactiveCocoa,paulyoung/ReactiveCocoa,ioshger0125/ReactiveCocoa,pzw224/ReactiveCocoa,tipbit/ReactiveCocoa,nickcheng/ReactiveCocoa,CQXfly/ReactiveCocoa,gabemdev/ReactiveCocoa,icepy/ReactiveCocoa,longv2go/ReactiveCocoa,icepy/ReactiveCocoa,monkeydbobo/ReactiveCocoa,Remitly/ReactiveCocoa,JohnJin007/ReactiveCocoa,sujeking/ReactiveCocoa,xiaobing2007/ReactiveCocoa,SanChain/ReactiveCocoa,DreamHill/ReactiveCocoa,msdgwzhy6/ReactiveCocoa,JackLian/ReactiveCocoa,ShawnLeee/ReactiveCocoa,goodheart/ReactiveCocoa,kiurentu/ReactiveCocoa,eliperkins/ReactiveCocoa,hbucius/ReactiveCocoa,hbucius/ReactiveCocoa,mtxs007/ReactiveCocoa,Eveian/ReactiveCocoa,Juraldinio/ReactiveCocoa,RuiAAPeres/ReactiveCocoa,towik/ReactiveCocoa,xiaoliyang/ReactiveCocoa,dullgrass/ReactiveCocoa,lixar/ReactiveCocoa,zzqiltw/ReactiveCocoa,terry408911/ReactiveCocoa,sdhzwm/ReactiveCocoa,Adlai-Holler/ReactiveCocoa,SanChain/ReactiveCocoa,wpstarnice/ReactiveCocoa,200895045/ReactiveCocoa,zhenlove/ReactiveCocoa,leichunfeng/ReactiveCocoa,ioshger0125/ReactiveCocoa,swizzlr/ReactiveCocoa,xulibao/ReactiveCocoa,tiger8888/ReactiveCocoa,vincentiss/ReactiveCocoa,SanChain/ReactiveCocoa,zhiwen1024/ReactiveCocoa,gabemdev/ReactiveCocoa,Ethan89/ReactiveCocoa,ailyanlu/ReactiveCocoa,ztchena/ReactiveCocoa,eliperkins/ReactiveCocoa,andersio/ReactiveCocoa,yonekawa/ReactiveCocoa,smilypeda/ReactiveCocoa,PSPDFKit-labs/ReactiveCocoa,OnTheWay1988/ReactiveCocoa,mattpetters/ReactiveCocoa,WEIBP/ReactiveCocoa,luerhouhou/ReactiveCocoa,335g/ReactiveCocoa,bensonday/ReactiveCocoa,eyu1988/ReactiveCocoa,rpowelll/ReactiveCocoa,AlanJN/ReactiveCocoa,qq644531343/ReactiveCocoa,zzqiltw/ReactiveCocoa,dachaoisme/ReactiveCocoa,huiping192/ReactiveCocoa,takeshineshiro/ReactiveCocoa,brasbug/ReactiveCocoa,cogddo/ReactiveCocoa,almassapargali/ReactiveCocoa,juliangrosshauser/ReactiveCocoa,chao95957/ReactiveCocoa,juliangrosshauser/ReactiveCocoa,mattpetters/ReactiveCocoa,tiger8888/ReactiveCocoa,ddc391565320/ReactiveCocoa,ztchena/ReactiveCocoa,jackywpy/ReactiveCocoa,ceekayel/ReactiveCocoa,yangyangluoluo/ReactiveCocoa,mtxs007/ReactiveCocoa,zzzworm/ReactiveCocoa,Liquidsoul/ReactiveCocoa,j364960953/ReactiveCocoa,SmartEncounter/ReactiveCocoa,smilypeda/ReactiveCocoa,JackLian/ReactiveCocoa,ericzhou2008/ReactiveCocoa,leelili/ReactiveCocoa,chieryw/ReactiveCocoa,KuPai32G/ReactiveCocoa,ohwutup/ReactiveCocoa,Eveian/ReactiveCocoa,calebd/ReactiveCocoa,tzongw/ReactiveCocoa,Carthage/ReactiveCocoa,KJin99/ReactiveCocoa,ddc391565320/ReactiveCocoa,chao95957/ReactiveCocoa,lixar/ReactiveCocoa,DreamHill/ReactiveCocoa,cnbin/ReactiveCocoa,AlanJN/ReactiveCocoa,yizzuide/ReactiveCocoa,llb1119/test,JohnJin007/ReactiveCocoa,Adlai-Holler/ReactiveCocoa,tonyli508/ReactiveCocoa,kiurentu/ReactiveCocoa,ShawnLeee/ReactiveCocoa,Khan/ReactiveCocoa,j364960953/ReactiveCocoa,beni55/ReactiveCocoa,jam891/ReactiveCocoa,koamac/ReactiveCocoa,fhchina/ReactiveCocoa,yangyangluoluo/ReactiveCocoa,longv2go/ReactiveCocoa,Farteen/ReactiveCocoa,brightcove/ReactiveCocoa,leelili/ReactiveCocoa,paulyoung/ReactiveCocoa,hoanganh6491/ReactiveCocoa,ceekayel/ReactiveCocoa,libiao88/ReactiveCocoa,BrooksWon/ReactiveCocoa,dz1111/ReactiveCocoa,sujeking/ReactiveCocoa,tonyarnold/ReactiveCocoa,Ricowere/ReactiveCocoa,takeshineshiro/ReactiveCocoa,xiaoliyang/ReactiveCocoa,CCOOOOLL/ReactiveCocoa,hj3938/ReactiveCocoa,swizzlr/ReactiveCocoa,Khan/ReactiveCocoa,nickcheng/ReactiveCocoa,tonyli508/ReactiveCocoa,hbucius/ReactiveCocoa,yaoxiaoyong/ReactiveCocoa,DongDongDongDong/ReactiveCocoa,Remitly/ReactiveCocoa,KuPai32G/ReactiveCocoa,qq644531343/ReactiveCocoa,stupidfive/ReactiveCocoa,luerhouhou/ReactiveCocoa,Remitly/ReactiveCocoa,zhukaixy/ReactiveCocoa,sandyway/ReactiveCocoa,emodeqidao/ReactiveCocoa,windgo/ReactiveCocoa,wpstarnice/ReactiveCocoa,335g/ReactiveCocoa,almassapargali/ReactiveCocoa,mtxs007/ReactiveCocoa,SuPair/ReactiveCocoa,goodheart/ReactiveCocoa,jrmiddle/ReactiveCocoa,tonyli508/ReactiveCocoa,KJin99/ReactiveCocoa,alvinvarghese/ReactiveCocoa,natan/ReactiveCocoa,koamac/ReactiveCocoa,Rupert-RR/ReactiveCocoa,wangqi211/ReactiveCocoa,calebd/ReactiveCocoa,buildo/ReactiveCocoa,natan/ReactiveCocoa,Ricowere/ReactiveCocoa,jaylib/ReactiveCocoa,ikesyo/ReactiveCocoa,imkerberos/ReactiveCocoa,howandhao/ReactiveCocoa,KuPai32G/ReactiveCocoa,eliperkins/ReactiveCocoa,gengjf/ReactiveCocoa,tonyarnold/ReactiveCocoa,ReactiveCocoa/ReactiveSwift,FelixYin66/ReactiveCocoa,pzw224/ReactiveCocoa,BrooksWon/ReactiveCocoa,OneSmallTree/ReactiveCocoa,DongDongDongDong/ReactiveCocoa,huiping192/ReactiveCocoa,LHDsimon/ReactiveCocoa,ShawnLeee/ReactiveCocoa,GuitarPlayer-Ma/ReactiveCocoa,CCOOOOLL/ReactiveCocoa,jianwoo/ReactiveCocoa,natestedman/ReactiveCocoa,eyu1988/ReactiveCocoa,gengjf/ReactiveCocoa,JohnJin007/ReactiveCocoa,yonekawa/ReactiveCocoa,on99/ReactiveCocoa,jianwoo/ReactiveCocoa,BlessNeo/ReactiveCocoa,yonekawa/ReactiveCocoa,Liquidsoul/ReactiveCocoa,Juraldinio/ReactiveCocoa,natan/ReactiveCocoa,isghe/R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eactiveCocoa,huiping192/ReactiveCocoa,Pikdays/ReactiveCocoa,monkeydbobo/ReactiveCocoa,dullgrass/ReactiveCocoa,JackLian/ReactiveCocoa,towik/ReactiveCocoa,jrmiddle/ReactiveCocoa,libiao88/ReactiveCocoa,llb1119/test,rpowelll/ReactiveCocoa,Pingco/ReactiveCocoa,yoichitgy/ReactiveCocoa,AlanJN/ReactiveCocoa,Ray0218/ReactiveCocoa,AndyZhaoHe/ReactiveCocoa,terry408911/ReactiveCocoa,OneSmallTree/ReactiveCocoa,200895045/ReactiveCocoa,windgo/ReactiveCocoa,esttorhe/ReactiveCocoa,zhukaixy/ReactiveCocoa,llb1119/test,dskatz22/ReactiveCocoa,on99/ReactiveCocoa,msdgwzhy6/ReactiveCocoa,chieryw/ReactiveCocoa,hilllinux/ReactiveCocoa,tzongw/ReactiveCocoa,j364960953/ReactiveCocoa,DreamHill/ReactiveCocoa,kaylio/ReactiveCocoa,jeelun/ReactiveCocoa,jeelun/ReactiveCocoa,add715/ReactiveCocoa,stevielu/ReactiveCocoa,koamac/ReactiveCocoa,AndyZhaoHe/ReactiveCocoa,jackywpy/ReactiveCocoa,nikita-leonov/ReactiveCocoa,hilllinux/ReactiveCocoa,Pingco/ReactiveCocoa,taylormoonxu/ReactiveCocoa,sugar2010/ReactiveCocoa,Ray0218/ReactiveCocoa,yizzuide/ReactiveCocoa,fanghao085/ReactiveCocoa,cogddo/ReactiveCocoa,rpowelll/ReactiveCocoa,ikesyo/ReactiveCocoa,zxq3220122/ReactiveCocoa,howandhao/ReactiveCocoa,kiurentu/ReactiveCocoa,clg0118/ReactiveCocoa,WEIBP/ReactiveCocoa,juliangrosshauser/ReactiveCocoa,windgo/ReactiveCocoa,ericzhou2008/ReactiveCocoa,bencochran/ReactiveCocoa,nickcheng/ReactiveCocoa,cogddo/ReactiveCocoa,fanghao085/ReactiveCocoa,add715/ReactiveCocoa,kevin-zqw/ReactiveCocoa,tornade0913/ReactiveCocoa,yytong/ReactiveCocoa,leelili/ReactiveCocoa,zhigang1992/ReactiveCocoa,AndyZhaoHe/ReactiveCocoa,richeterre/ReactiveCocoa,zhenlove/ReactiveCocoa,dachaoisme/ReactiveCocoa,zhaoguohui/ReactiveCocoa,imkerberos/ReactiveCocoa,kevin-zqw/ReactiveCocoa,icepy/ReactiveCocoa,yaoxiaoyong/ReactiveCocoa,taylormoonxu/ReactiveCocoa,emodeqidao/ReactiveCocoa,natestedman/ReactiveCocoa,hoanganh6491/ReactiveCocoa,zhenlove/ReactiveCocoa,KJin99/ReactiveCocoa,victorlin/ReactiveCocoa,sujeking/ReactiveCocoa,tipbit/ReactiveCocoa,add715/ReactiveCocoa,valleyman86/ReactiveCocoa,ailyanlu/ReactiveCocoa,jam891/ReactiveCocoa,libiao88/ReactiveCocoa,shaohung001/ReactiveCocoa,dskatz22/ReactiveCocoa,andersio/ReactiveCocoa,brightcove/ReactiveCocoa,sandyway/ReactiveCocoa,zhaoguohui/ReactiveCocoa,dullgrass/ReactiveCocoa,alvinvarghese/ReactiveCocoa,yoichitgy/ReactiveCocoa