misleading way to trigger development
misleading way to trigger development

If the attribute development is used in the script the validator itself runs and invalidates such attribute. Using `#development=1` in the URL seems to be accepted and, indeed, suggested in the README too.
amoad-amoe/amphtml,danielrozenberg/amphtml,yevheniiminin/amphtml,ruturajv-media-net/amphtml,fullspeed-sp/amphtml,jasti/amphtml,criteo-forks/amphtml,NataliaLKB/amphtml,powdercloud/amphtml,alanorozco/amphtml,honeybadgerdontcare/amphtml,kamtschatka/amphtml,nexxtv/amphtml,pedjoni8/amphtml,rifler/amphtml,BenDz/amphtml,voyagegroup/amphtml,adtechnology/amphtml,mlb7687/amphtml,bpaduch/amphtml,wjfang/amphtml,vmarteev/amphtml,camelburrito/amphtml,jmadler/amphtml,tdrl/amphtml,Gregable/amphtml,camelburrito/amphtml,cory-work/amphtml,kixer-com/amphtml,ruturajv-media-net/amphtml,rifler/amphtml,luciancrasovan/amphtml,spotxchange/amphtml,cory-work/amphtml,yandex-pcode/amphtml,amoad-amoe/amphtml,tlong2/amphtml,burtcorp/amphtml,honeybadgerdontcare/amphtml,galeksic/amphtml,sortable/amphtml,mkhatib/amphtml,src-code/amphtml,sortable/amphtml,rlugojr/amphtml,ADITION/amphtml,lannka/amphtml,wjfang/amphtml,criteo-forks/amphtml,DistroScale/amphtml,yieldbot/amphtml,kamtschatka/amphtml,DistroScale/amphtml,pedjoni8/amphtml,Gregable/amphtml,engtat/amphtml,triplelift/amphtml,lannka/amphtml,rajkumarsrk/amphtml,sriramkrish85/amphtml,Re-lM/amphtml,ecoron/amphtml,honeybadgerdontcare/amphtml,rsimha-amp/amphtml,voyagegroup/amphtml,Mixpo/amphtml,Adtoma/amphtml,comScore/amphtml,media-net/amphtml,loic-seguin/amphtml,adiant/amphtml,britice/amphtml,cvializ/amphtml,wjfang/amphtml,ithinkihaveacat/amphtml,fullspeed-sp/amphtml,erwinmombay/amphtml,keithwrightbos/amphtml,ampproject/amphtml,criteo-forks/amphtml,Adtoma/amphtml,gumgum/amphtml,avimehta/amphtml,Gregable/amphtml,dvoytenko/amphtml,rlugojr/amphtml,rsimha-amp/amphtml,devjsun/amphtml,powdercloud/amphtml,Mixpo/amphtml,erwinmombay/amphtml,kmh287/amphtml,prateekbh/amphtml,taboola/amphtml,yandex-pcode/amphtml,adiant/amphtml,cvializ/amphtml,vmarteev/amphtml,adup-tech/amphtml,sriramkrish85/amphtml,alanorozco/amphtml,prateekbh/amphtml,lzanol/amphtml,comScore/amphtml,criteo-forks/amphtml,lannka/amphtml,ColombiaAnalytics/amphtml,shawnbuso/amphtml,Adtoma/amphtml,clawr/amphtml,cory-work/amphtml,yieldmo/amphtml,cvializ/amphtml,nathangoulding/amphtml,rajkumarsrk/amphtml,jasti/amphtml,sklobovskaya/amphtml,media-net/amphtml,rlugojr/amphtml,voyagegroup/amphtml,jlucero-contentad/amphtml,BrightcoveOS/amphtml,widespace-os/amphtml,yevheniiminin/amphtml,jpettitt/amphtml,ampproject/amphtml,AaronCritchley/amphtml,techhtml/amphtml,loic-seguin/amphtml,burtcorp/amphtml,rsimha-amp/amphtml,ruturajv-media-net/amphtml,burtcorp/amphtml,yieldbot/amphtml,sortable/amphtml,btownsend/amphtml,dotandads/amphtml,BenDz/amphtml-atinternet,jasti/amphtml,powdercloud/amphtml,engtat/amphtml,powdercloud/amphtml,donttrustthisbot/amphtml,Re-lM/amphtml,rajkumarsrk/amphtml,kamtschatka/amphtml,comScore/amphtml,sharethrough/amphtml,zhouyx/amphtml,ADITION/amphtml,taboola/amphtml,rajkumarsrk/amphtml,tlong2/amphtml,cvializ/amphtml,koshka/amphtml,mkhatib/amphtml,jpettitt/amphtml,zhucl/amphtml,AaronCritchley/amphtml,ecoron/amphtml,src-code/amphtml,kixer-com/amphtml,taboola/amphtml,widespace-os/amphtml,lannka/amphtml,ADITION/amphtml,devjsun/amphtml,ericlindley-g/amphtml,pietergreyling/amphtml,fullspeed-sp/amphtml,nexxtv/amphtml,cory-work/amphtml,jlucero-contentad/amphtml,triplelift/amphtml,wjfang/amphtml,mkhatib/amphtml,kixer-com/amphtml,JuliusThms/amphtml,jridgewell/amphtml,devjsun/amphtml,nekodo/amphtml,Adtoma/amphtml,prateekbh/amphtml,danielrozenberg/amphtml,adiant/amphtml,lannka/amphtml,amoad-amoe/amphtml,arealit/amphtml,widespace-os/amphtml,clawr/amphtml,rsimha-amp/amphtml,shawnbuso/amphtml,BenDz/amphtml,jridgewell/amphtml,sharethrough/amphtml,shawnbuso/amphtml,bpaduch/amphtml,camelburrito/amphtml,koshka/amphtml,cvializ/amphtml,zhucl/amphtml,britice/amphtml,techhtml/amphtml,engtat/amphtml,ColombiaAnalytics/amphtml,jridgewell/amphtml,ColombiaAnalytics/amphtml,prateekbh/amphtml,rsimha-amp/amphtml,mlb7687/amphtml,interspacejp/amphtml,britice/amphtml,yevheniiminin/amphtml,erwinmombay/amphtml,Re-lM/amphtml,luciancrasovan/amphtml,criteo-forks/amphtml,NataliaLKB/amphtml,chrisbrent/amphtml,burtcorp/amphtml,yieldbot/amphtml,Adtoma/amphtml,adup-tech/amphtml,gumgum/amphtml,yevheniiminin/amphtml,zhangsu/amphtml,Mobusi-ads/amphtml,plista/amphtml,triplelift/amphtml,smartadserver/amphtml,bpaduch/amphtml,aghassemi/amphtml,honeybadgerdontcare/amphtml,kamtschatka/amphtml,laterpay/amphtml,media-net/amphtml,triplelift/amphtml,comScore/amphtml,media-net/amphtml,triplelift/amphtml,voyagegroup/amphtml,cvializ/amphtml,alanorozco/amphtml,sebastianbenz/amphtml,lzanol/amphtml,ericlindley-g/amphtml,zhucl/amphtml,engtat/amphtml,DarXector/amphtml,pietergreyling/amphtml,mlb7687/amphtml,DistroScale/amphtml,avimehta/amphtml,Meggin/amphtml,AaronCritchley/amphtml,mhc-gh/amphtml,sharethrough/amphtml,koshka/amphtml,sriramkrish85/amphtml,dvoytenko/amphtml,smartadserver/amphtml,jdelhommeau/amphtml,sklobovskaya/amphtml,BrightcoveOS/amphtml,smartadserver/amphtml,camelburrito/amphtml,jasti/amphtml,laterpay/amphtml,Mobusi-ads/amphtml,dvoytenko/amphtml,DarXector/amphtml,pietergreyling/amphtml,adtechnology/amphtml,adup-tech/amphtml,adup-tech/amphtml,wjfang/amphtml,chrisbrent/amphtml,jpettitt/amphtml,ampproject/amphtml,keithwrightbos/amphtml,jdelhommeau/amphtml,nexxtv/amphtml,kmh287/amphtml,chaveznvg/amphtml,Gregable/amphtml,interspacejp/amphtml,widespace-os/amphtml,triplelift/amphtml,adiant/amphtml,spotxchange/amphtml,nexxtv/amphtml,rlugojr/amphtml,bpaduch/amphtml,jmadler/amphtml,mlb7687/amphtml,dotandads/amphtml,Lith/amphtml,yieldmo/amphtml,mkhatib/amphtml,Mixpo/amphtml,danielrozenberg/amphtml,Mixpo/amphtml,DAC-f1h-dev/amphtml,rlugojr/amphtml,chaveznvg/amphtml,aghassemi/amphtml,src-code/amphtml,sklobovskaya/amphtml,simplereach/amphtml,powdercloud/amphtml,devjsun/amphtml,media-net/amphtml,AaronCritchley/amphtml,sharethrough/amphtml,spotxchange/amphtml,arealit/amphtml,zhangsu/amphtml,AaronCritchley/amphtml,avimehta/amphtml,jpettitt/amphtml,jaboc83/amphtml,techhtml/amphtml,jlucero-contentad/amphtml,fullspeed-sp/amphtml,DAC-f1h-dev/amphtml,cory-work/amphtml,taboola/amphtml,honeybadgerdontcare/amphtml,lzanol/amphtml,sebastianbenz/amphtml,rifler/amphtml,zhouyx/amphtml,galeksic/amphtml,zhouyx/amphtml,sortable/amphtml,vmarteev/amphtml,luciancrasovan/amphtml,BenDz/amphtml,donttrustthisbot/amphtml,mhc-gh/amphtml,Mobusi-ads/amphtml,adtechnology/amphtml,aghassemi/amphtml,adtechnology/amphtml,techhtml/amphtml,Lith/amphtml,DAC-f1h-dev/amphtml,keithwrightbos/amphtml,bpaduch/amphtml,mkhatib/amphtml,sebastianbenz/amphtml,interspacejp/amphtml,spotxchange/amphtml,dvoytenko/amphtml,yieldmo/amphtml,bpaduch/amphtml,Meggin/amphtml,yieldbot/amphtml,yieldmo/amphtml,dotandads/amphtml,kamtschatka/amphtml,nathangoulding/amphtml,aghassemi/amphtml,taboola/amphtml,spotxchange/amphtml,AaronCritchley/amphtml,jdelhommeau/amphtml,arealit/amphtml,JuliusThms/amphtml,jdelhommeau/amphtml,tlong2/amphtml,jmadler/amphtml,media-net/amphtml,tlong2/amphtml,amoad-amoe/amphtml,gumgum/amphtml,nexxtv/amphtml,ampproject/amphtml,koshka/amphtml,interspacejp/amphtml,bpaduch/amphtml,loic-seguin/amphtml,kmh287/amphtml,tdrl/amphtml,shawnbuso/amphtml,jridgewell/amphtml,zhouyx/amphtml,jridgewell/amphtml,laterpay/amphtml,pietergreyling/amphtml,vmarteev/amphtml,plista/amphtml,mhc-gh/amphtml,avimehta/amphtml,erwinmombay/amphtml,zhangsu/amphtml,Meggin/amphtml,jridgewell/amphtml,devjsun/amphtml,Lith/amphtml,adiant/amphtml,adiant/amphtml,adiant/amphtml,pedjoni8/amphtml,zhucl/amphtml,nexxtv/amphtml,src-code/amphtml,ampproject/amphtml,ruturajv-media-net/amphtml,techhtml/amphtml,ADITION/amphtml,media-net/amphtml,ecoron/amphtml,jpettitt/amphtml,Lith/amphtml,danielrozenberg/amphtml,adtechnology/amphtml,shawnbuso/amphtml,prateekbh/amphtml,kixer-com/amphtml,ADITION/amphtml,vmarteev/amphtml,arealit/amphtml,kamtschatka/amphtml,kmh287/amphtml,jaboc83/amphtml,clawr/amphtml,camelburrito/amphtml,DAC-f1h-dev/amphtml,camelburrito/amphtml,jdelhommeau/amphtml,zhucl/amphtml,DarXector/amphtml,zhouyx/amphtml,yandex-pcode/amphtml,Gregable/amphtml,BenDz/amphtml,src-code/amphtml,nekodo/amphtml,sriramkrish85/amphtml,DistroScale/amphtml,chaveznvg/amphtml,widespace-os/amphtml,yevheniiminin/amphtml,ruturajv-media-net/amphtml,jmadler/amphtml,taboola/amphtml,zhucl/amphtml,ecoron/amphtml,interspacejp/amphtml,Gregable/amphtml,ericlindley-g/amphtml,rajkumarsrk/amphtml,Mixpo/amphtml,media-net/amphtml,laterpay/amphtml,yandex-pcode/amphtml,comScore/amphtml,tdrl/amphtml,engtat/amphtml,mhc-gh/amphtml,yieldmo/amphtml,Gregable/amphtml,yieldbot/amphtml,mhc-gh/amphtml,powdercloud/amphtml,comScore/amphtml,smartadserver/amphtml,zhangsu/amphtml,src-code/amphtml,burtcorp/amphtml,powdercloud/amphtml,engtat/amphtml,tdrl/amphtml,jasti/amphtml,galeksic/amphtml,burtcorp/amphtml,dotandads/amphtml,DAC-f1h-dev/amphtml,pietergreyling/amphtml,cory-work/amphtml,jasti/amphtml,keithwrightbos/amphtml,alanorozco/amphtml,wjfang/amphtml,tdrl/amphtml,britice/amphtml,rifler/amphtml,koshka/amphtml,sebastianbenz/amphtml,ithinkihaveacat/amphtml,clawr/amphtml,lzanol/amphtml,DarXector/amphtml,BenDz/amphtml,chaveznvg/amphtml,clawr/amphtml,yandex-pcode/amphtml,fullspeed-sp/amphtml,kmh287/amphtml,dotandads/amphtml,nexxtv/amphtml,jridgewell/amphtml,dvoytenko/amphtml,Adtoma/amphtml,Lith/amphtml,widespace-os/amphtml,gumgum/amphtml,kixer-com/amphtml,ampproject/amphtml,taboola/amphtml,sklobovskaya/amphtml,danielrozenberg/amphtml,JuliusThms/amphtml,sklobovskaya/amphtml,danielrozenberg/amphtml,adup-tech/amphtml,ithinkihaveacat/amphtml,avimehta/amphtml,smartadserver/amphtml,luciancrasovan/amphtml,BrightcoveOS/amphtml,DarXector/amphtml,simplereach/amphtml,BenDz/amphtml-atinternet,alanorozco/amphtml,kixer-com/amphtml,jmadler/amphtml,nekodo/amphtml,adtechnology/amphtml,Re-lM/amphtml,zhucl/amphtml,lugray/amphtml,DAC-f1h-dev/amphtml,avimehta/amphtml,ampproject/amphtml,jdelhommeau/amphtml,prateekbh/amphtml,BrightcoveOS/amphtml,pedjoni8/amphtml,JuliusThms/amphtml,luciancrasovan/amphtml,dotandads/amphtml,criteo-forks/amphtml,erwinmombay/amphtml,laterpay/amphtml,pedjoni8/amphtml,pietergreyling/amphtml,ericlindley-g/amphtml,voyagegroup/amphtml,lzanol/amphtml,galeksic/amphtml,vmarteev/amphtml,lannka/amphtml,ampproject/amphtml,gumgum/amphtml,zhangsu/amphtml,techhtml/amphtml,rsimha-amp/amphtml,tlong2/amphtml,DistroScale/amphtml,donttrustthisbot/amphtml,keithwrightbos/amphtml,sklobovskaya/amphtml,rifler/amphtml,lugray/amphtml,ithinkihaveacat/amphtml,donttrustthisbot/amphtml,keithwrightbos/amphtml,donttrustthisbot/amphtml,rajkumarsrk/amphtml,rifler/amphtml,nathangoulding/amphtml,jlucero-contentad/amphtml,tdrl/amphtml,BrightcoveOS/amphtml,rlugojr/amphtml,wjfang/amphtml,Mixpo/amphtml,clawr/amphtml,fullspeed-sp/amphtml,cory-work/amphtml,chaveznvg/amphtml,aghassemi/amphtml,interspacejp/amphtml,sklobovskaya/amphtml,yandex-pcode/amphtml,amoad-amoe/amphtml,smartadserver/amphtml,voyagegroup/amphtml,erwinmombay/amphtml,sharethrough/amphtml,BenDz/amphtml,NataliaLKB/amphtml,camelburrito/amphtml,loic-seguin/amphtml,ericlindley-g/amphtml,mkhatib/amphtml,mlb7687/amphtml,donttrustthisbot/amphtml,dvoytenko/amphtml,jlucero-contentad/amphtml,ecoron/amphtml,btownsend/amphtml,gumgum/amphtml,JuliusThms/amphtml,Gregable/amphtml,Mobusi-ads/amphtml,shawnbuso/amphtml,mhc-gh/amphtml,lugray/amphtml,clawr/amphtml,laterpay/amphtml,gumgum/amphtml,sriramkrish85/amphtml,btownsend/amphtml,ColombiaAnalytics/amphtml,shawnbuso/amphtml,kmh287/amphtml,luciancrasovan/amphtml,danielrozenberg/amphtml,prateekbh/amphtml,comScore/amphtml,nekodo/amphtml,arealit/amphtml,rajkumarsrk/amphtml,JuliusThms/amphtml,Lith/amphtml,engtat/amphtml,yieldmo/amphtml,jpettitt/amphtml,nathangoulding/amphtml,vmarteev/amphtml,DarXector/amphtml,aghassemi/amphtml,ericlindley-g/amphtml,sortable/amphtml,ecoron/amphtml,chrisbrent/amphtml,yandex-pcode/amphtml,koshka/amphtml,sebastianbenz/amphtml,NataliaLKB/amphtml,voyagegroup/amphtml,galeksic/amphtml,alanorozco/amphtml,donttrustthisbot/amphtml,tlong2/amphtml,honeybadgerdontcare/amphtml,simplereach/amphtml,sharethrough/amphtml,jpettitt/amphtml,jlucero-contentad/amphtml,lannka/amphtml,chaveznvg/amphtml,spotxchange/amphtml,DistroScale/amphtml,amoad-amoe/amphtml,ruturajv-media-net/amphtml,alanorozco/amphtml,zhangsu/amphtml,adup-tech/amphtml,yieldbot/amphtml,plista/amphtml,mhc-gh/amphtml,arealit/amphtml,danielrozenberg/amphtml,devjsun/amphtml,keithwrightbos/amphtml,yieldmo/amphtml,yevheniiminin/amphtml,jmadler/amphtml,zhouyx/amphtml,alanorozco/amphtml,rsimha-amp/amphtml,Mobusi-ads/amphtml,lzanol/amphtml,pedjoni8/amphtml,mlb7687/amphtml,BrightcoveOS/amphtml,sortable/amphtml,Mobusi-ads/amphtml,BenDz/amphtml-atinternet,jpettitt/amphtml,kixer-com/amphtml,arealit/amphtml,sriramkrish85/amphtml,honeybadgerdontcare/amphtml,luciancrasovan/amphtml,plista/amphtml,zhouyx/amphtml,mhc-gh/amphtml,sebastianbenz/amphtml