Simplify/robustify `update`
Simplify/robustify `update`

nikolas/backbone,webcoding/backbone,heroazure/backbone,Bug2014/backbone,dillonforrest/backbone-df,gougouGet/backbone,batigoal1980/backbone_example,tadwhitaker/backbone,Sachin-Ganesh/backbone,aihua/backbone,chyeh727/backbone,Khan/backbone,leimd/backbone,7213/backbone,jordansexton/backboner,jridgewell/backbone,amdjs/backbone,dcheepurupalli/backbone,udhayam/backbone,virtru-components/backbone,streamablevideo/backbone,wangcan2014/backbone,dak/backbone,componentizr/backbone,jstrimpel/backbone,mpapp/backbone,wangdahoo/backbone,vin100bk/backbone,cailong1028/backbone,jashkenas/backbone,sitexa/backbone,Diwahars/backbone,maryrosecook/backbone-df,ThiagoGarciaAlves/backbone,au-phiware/backbone,rashmisajjan/backbone,howtolearntocode/backbone,premkumargithub/backbone,JesseQin/backbone,ebsco/backbone,sumyfly/backbone,ThisIsManta/Backbone,gmaclennan/backbone,liudianpeng/backbone,heroazure/backbone,closeio/backbone,gdi2290/backbone,closeio/backbone,alekskorolev/lightbones,Krasnyanskiy/backbone,platinumazure/backbone,IsoldaJS/isolda-models,zgl2007dj/backbone,jmeas/backbone,luffy94608/backbone,anhtholee/backbone,dak/backbone,embarknow/backbone,maryrosecook/backbone-df,amitpatange88/backbonejs,honger05/backbone,premkumargithub/backbone,trizko/backbone,wxmfront/backbone,DannyDelott/backbone,wjb12/backbone,Krasnyanskiy/backbone,linalu1/backbone,moccen/backbone,antoniogarrote/backbone,neocotic/hipbone,moccen/backbone,hugohua/backbone,wakanpaladin/mybackbone,rjz/boneless,streamablevideo/backbone,paulfalgout/backbone,zhangwei001/backbone,batigoal1980/backbone_example,DannyDelott/backbone,Connectlegendary/backbone,amitpatange88/backbonejs,mrblueblue/backbone,jewsroch/backbone,kuychaco/backbone,ywenjinlin/backbone,zhoufan879/backbone,jungjung917/backbone,vincent1988/backbone,fanhc019/backbone,luffy94608/backbone,moimikey/backbone,paulfalgout/backbone,oss-practice/backbone,LovelyL25/backbone.js,jridgewell/backbone,wakanpaladin/mybackbone,JesseQin/backbone,zgl2007dj/backbone,elma-cao/backbone,cailong1028/backbone,timebackzhou/backbone,feychenie/backbone,Connectlegendary/backbone,tzkKrbys/backbone,akre54/backbone,sunday-star/backbone,dillonforrest/backbone-df,mmolinastudio/backbone,alekskorolev/lightbones,guahanweb/backbone,GrimDerp/backbone,IsoldaJS/isolda-pubsub,feychenie/backbone,cgvarela/backbone,nvoron23/backbone,ppker/backbone,wushuyi/backbone,dcheepurupalli/backbone,elancom/backbone,rashmisajjan/backbone,au-phiware/backbone,chyeh727/backbone,ereddate/backbone,ThiagoGarciaAlves/backbone,ThisIsManta/Backbone,tgriesser/backbone,Bug2014/backbone,Niades/backbone,Akkuma/backbone,webapp/library,yuhualingfeng/backbone,tzkKrbys/backbone,gougouGet/backbone,megawac/backbone,sumyfly/backbone,getshuvo/backbone,braddunbar/backbone,cgvarela/backbone,anhtholee/backbone,Khan/backbone,ereddate/backbone,guahanweb/backbone,zhoufan879/backbone,npmcomponent/jashkenas-backbone,ohbarye/backbone,wangdahoo/backbone,tadwhitaker/backbone,gmaclennan/backbone,liudianpeng/backbone,tibic/backbone,akre54/backbone,pandoraui/backbone,FishbaitHarry/backbone,vin100bk/backbone,Khan/backbone,yuhualingfeng/backbone,ebsco/backbone,Aplopio/backbone,sueyeh/backbone,elma-cao/backbone,neocotic/hipbone,ntgn81/backbone,craigmichaelmartin/backbone,craigmichaelmartin/backbone,kuychaco/backbone,maryrosecook/backbone-df,FormidableLabs/backbone,wxmfront/backbone,ridixcr/backbone,nikolas/backbone,embarknow/backbone,gitterHQ/backbone,lujocom/backbone,sueyeh/backbone,Flip120/backbone,jasoncbautista/backboneX,yawenl/backbone,GrimDerp/backbone,darrrk/backbone,trizko/backbone,ppker/backbone,platinumazure/backbone,jstrimpel/backbone,yawenl/backbone,pandoraui/backbone,wushuyi/backbone,mmolinastudio/backbone,linalu1/backbone,huanglp47/backbone,guigrpa/backbone,udhayam/backbone,ntgn81/backbone,wangcan2014/backbone,braddunbar/backbone,GerHobbelt/backbone,Sachin-Ganesh/backbone,zdespolit/backbone,webcoding/backbone,jewsroch/backbone,honger05/backbone,zhangdimelody/backbone,youprofit/backbone,jungjung917/backbone,howtolearntocode/backbone,fanhc019/backbone,aihua/backbone,wjb12/backbone,sitexa/backbone,moimikey/backbone,webapp/library,GerHobbelt/backbone,Aplopio/backbone,leimd/backbone,zhangdimelody/backbone,mrblueblue/backbone,LovelyL25/backbone.js,tibic/backbone,elancom/backbone,lujocom/backbone,7213/backbone,darrrk/backbone,vincent1988/backbone,Niades/backbone,ywenjinlin/backbone,nvoron23/backbone,jashkenas/backbone,zdespolit/backbone,Flip120/backbone,Aplopio/backbone,getshuvo/backbone,ridixcr/backbone,huanglp47/backbone,ohbarye/backbone,FishbaitHarry/backbone,Diwahars/backbone,timebackzhou/backbone,dillonforrest/backbone-df,lastjune/backbone,zhangwei001/backbone,sunday-star/backbone,youprofit/backbone,jmeas/backbone,lastjune/backbone