Add unit test for image tag with extra attributes
Add unit test for image tag with extra attributes

benemery/wagtail,thenewguy/wagtail,zerolab/wagtail,Tivix/wagtail,chrxr/wagtail,kaedroho/wagtail,iho/wagtail,taedori81/wagtail,torchbox/wagtail,kaedroho/wagtail,benjaoming/wagtail,chrxr/wagtail,tangentlabs/wagtail,janusnic/wagtail,taedori81/wagtail,Pennebaker/wagtail,gogobook/wagtail,serzans/wagtail,jorge-marques/wagtail,iho/wagtail,iho/wagtail,Klaudit/wagtail,davecranwell/wagtail,kurtrwall/wagtail,kurtrwall/wagtail,bjesus/wagtail,mixxorz/wagtail,tangentlabs/wagtail,takeflight/wagtail,nealtodd/wagtail,rjsproxy/wagtail,gasman/wagtail,nimasmi/wagtail,Klaudit/wagtail,mixxorz/wagtail,zerolab/wagtail,nutztherookie/wagtail,stevenewey/wagtail,wagtail/wagtail,benjaoming/wagtail,hanpama/wagtail,mixxorz/wagtail,dresiu/wagtail,WQuanfeng/wagtail,bjesus/wagtail,stevenewey/wagtail,taedori81/wagtail,quru/wagtail,WQuanfeng/wagtail,quru/wagtail,lojack/wagtail,nilnvoid/wagtail,iansprice/wagtail,janusnic/wagtail,marctc/wagtail,chimeno/wagtail,benemery/wagtail,rv816/wagtail,nutztherookie/wagtail,rv816/wagtail,gasman/wagtail,gasman/wagtail,willcodefortea/wagtail,wagtail/wagtail,mayapurmedia/wagtail,nimasmi/wagtail,takeflight/wagtail,quru/wagtail,rjsproxy/wagtail,thenewguy/wagtail,dresiu/wagtail,nrsimha/wagtail,jordij/wagtail,lojack/wagtail,mayapurmedia/wagtail,benjaoming/wagtail,hamsterbacke23/wagtail,lojack/wagtail,nilnvoid/wagtail,gasman/wagtail,chrxr/wagtail,gogobook/wagtail,timorieber/wagtail,chimeno/wagtail,rsalmaso/wagtail,timorieber/wagtail,dresiu/wagtail,KimGlazebrook/wagtail-experiment,Pennebaker/wagtail,taedori81/wagtail,gogobook/wagtail,jordij/wagtail,takeflight/wagtail,thenewguy/wagtail,FlipperPA/wagtail,mjec/wagtail,takeflight/wagtail,benjaoming/wagtail,jnns/wagtail,nutztherookie/wagtail,davecranwell/wagtail,WQuanfeng/wagtail,m-sanders/wagtail,mixxorz/wagtail,torchbox/wagtail,darith27/wagtail,zerolab/wagtail,hanpama/wagtail,iansprice/wagtail,kurtw/wagtail,stevenewey/wagtail,darith27/wagtail,mixxorz/wagtail,inonit/wagtail,kurtw/wagtail,mephizzle/wagtail,willcodefortea/wagtail,KimGlazebrook/wagtail-experiment,mephizzle/wagtail,timorieber/wagtail,Toshakins/wagtail,Pennebaker/wagtail,jorge-marques/wagtail,mjec/wagtail,m-sanders/wagtail,hamsterbacke23/wagtail,rjsproxy/wagtail,iho/wagtail,chimeno/wagtail,taedori81/wagtail,mayapurmedia/wagtail,JoshBarr/wagtail,hanpama/wagtail,kurtw/wagtail,100Shapes/wagtail,takeshineshiro/wagtail,hamsterbacke23/wagtail,thenewguy/wagtail,mjec/wagtail,rsalmaso/wagtail,jorge-marques/wagtail,hamsterbacke23/wagtail,wagtail/wagtail,mephizzle/wagtail,mikedingjan/wagtail,Klaudit/wagtail,quru/wagtail,Pennebaker/wagtail,nilnvoid/wagtail,bjesus/wagtail,nealtodd/wagtail,bjesus/wagtail,torchbox/wagtail,Toshakins/wagtail,iansprice/wagtail,serzans/wagtail,serzans/wagtail,rv816/wagtail,dresiu/wagtail,JoshBarr/wagtail,rsalmaso/wagtail,willcodefortea/wagtail,davecranwell/wagtail,zerolab/wagtail,kurtrwall/wagtail,janusnic/wagtail,chimeno/wagtail,tangentlabs/wagtail,nimasmi/wagtail,janusnic/wagtail,mikedingjan/wagtail,100Shapes/wagtail,kaedroho/wagtail,kurtrwall/wagtail,jnns/wagtail,nealtodd/wagtail,takeshineshiro/wagtail,mayapurmedia/wagtail,kaedroho/wagtail,jnns/wagtail,gogobook/wagtail,marctc/wagtail,WQuanfeng/wagtail,benemery/wagtail,Toshakins/wagtail,darith27/wagtail,chrxr/wagtail,mikedingjan/wagtail,zerolab/wagtail,inonit/wagtail,chimeno/wagtail,nutztherookie/wagtail,davecranwell/wagtail,rsalmaso/wagtail,m-sanders/wagtail,torchbox/wagtail,KimGlazebrook/wagtail-experiment,marctc/wagtail,takeshineshiro/wagtail,gasman/wagtail,wagtail/wagtail,jordij/wagtail,Tivix/wagtail,nrsimha/wagtail,willcodefortea/wagtail,timorieber/wagtail,inonit/wagtail,nealtodd/wagtail,benemery/wagtail,darith27/wagtail,FlipperPA/wagtail,nrsimha/wagtail,nimasmi/wagtail,thenewguy/wagtail,Toshakins/wagtail,jnns/wagtail,rsalmaso/wagtail,iansprice/wagtail,rv816/wagtail,JoshBarr/wagtail,m-sanders/wagtail,mephizzle/wagtail,jorge-marques/wagtail,jordij/wagtail,inonit/wagtail,JoshBarr/wagtail,mjec/wagtail,wagtail/wagtail,takeshineshiro/wagtail,tangentlabs/wagtail,stevenewey/wagtail,nilnvoid/wagtail,Tivix/wagtail,100Shapes/wagtail,serzans/wagtail,rjsproxy/wagtail,jorge-marques/wagtail,KimGlazebrook/wagtail-experiment,mikedingjan/wagtail,nrsimha/wagtail,Klaudit/wagtail,FlipperPA/wagtail,FlipperPA/wagtail,dresiu/wagtail,marctc/wagtail,Tivix/wagtail,kaedroho/wagtail,kurtw/wagtail,hanpama/wagtail