Fixes #2684 -- tweak toJSON docs.
Fixes #2684 -- tweak toJSON docs.

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