Auto merge of #8097 - wenderen:8090-partialeq-for-mutheap, r=nox
Auto merge of #8097 - wenderen:8090-partialeq-for-mutheap, r=nox

implement PartialEq for MutHeap<JS<T>> and MutNullableHeap<JS<T>>

for #8090

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saneyuki/servo,DominoTree/servo,emilio/servo,mattnenterprise/servo,pyfisch/servo,szeged/servo,canaltinova/servo,mbrubeck/servo,larsbergstrom/servo,canaltinova/servo,canaltinova/servo,splav/servo,ConnorGBrewster/servo,jimberlage/servo,DominoTree/servo,peterjoel/servo,saneyuki/servo,peterjoel/servo,DominoTree/servo,anthgur/servo,peterjoel/servo,avadacatavra/servo,nrc/servo,peterjoel/servo,mattnenterprise/servo,splav/servo,anthgur/servo,thiagopnts/servo,jimberlage/servo,szeged/servo,szeged/servo,saneyuki/servo,upsuper/servo,pyfisch/servo,avadacatavra/servo,SimonSapin/servo,thiagopnts/servo,larsbergstrom/servo,dati91/servo,sadmansk/servo,jimberlage/servo,DominoTree/servo,upsuper/servo,splav/servo,DominoTree/servo,anthgur/servo,mattnenterprise/servo,cbrewster/servo,emilio/servo,CJ8664/servo,CJ8664/servo,fiji-flo/servo,ConnorGBrewster/servo,larsbergstrom/servo,eddyb/servo,rnestler/servo,splav/servo,upsuper/servo,rnestler/servo,dsandeephegde/servo,saneyuki/servo,peterjoel/servo,saneyuki/servo,splav/servo,larsbergstrom/servo,saneyuki/servo,cbrewster/servo,pyfisch/servo,larsbergstrom/servo,szeged/servo,canaltinova/servo,DominoTree/servo,szeged/servo,DominoTree/servo,notriddle/servo,mbrubeck/servo,SimonSapin/servo,rnestler/servo,splav/servo,cbrewster/servo,dati91/servo,avadacatavra/servo,canaltinova/servo,larsbergstrom/servo,steveklabnik/servo,rnestler/servo,thiagopnts/servo,thiagopnts/servo,ConnorGBrewster/servo,SimonSapin/servo,peterjoel/servo,DominoTree/servo,sadmansk/servo,cbrewster/servo,steveklabnik/servo,notriddle/servo,paulrouget/servo,sadmansk/servo,nrc/servo,pyfisch/servo,sadmansk/servo,szeged/servo,anthgur/servo,szeged/servo,dsandeephegde/servo,notriddle/servo,nnethercote/servo,avadacatavra/servo,pyfisch/servo,emilio/servo,larsbergstrom/servo,szeged/servo,fiji-flo/servo,notriddle/servo,dati91/servo,ConnorGBrewster/servo,emilio/servo,dati91/servo,upsuper/servo,canaltinova/servo,steveklabnik/servo,rnestler/servo,mbrubeck/servo,fiji-flo/servo,upsuper/servo,emilio/servo,nrc/servo,steveklabnik/servo,peterjoel/servo,CJ8664/servo,notriddle/servo,dsandeephegde/servo,pyfisch/servo,SimonSapin/servo,jimberlage/servo,nnethercote/servo,jimberlage/servo,mbrubeck/servo,eddyb/servo,dsandeephegde/servo,nnethercote/servo,ConnorGBrewster/servo,emilio/servo,upsuper/servo,KiChjang/servo,thiagopnts/servo,KiChjang/servo,anthgur/servo,larsbergstrom/servo,thiagopnts/servo,mattnenterprise/servo,ConnorGBrewster/servo,dsandeephegde/servo,KiChjang/servo,jimberlage/servo,splav/servo,szeged/servo,jimberlage/servo,eddyb/servo,larsbergstrom/servo,anthgur/servo,CJ8664/servo,saneyuki/servo,nnethercote/servo,nnethercote/servo,DominoTree/servo,CJ8664/servo,peterjoel/servo,splav/servo,notriddle/servo,mattnenterprise/servo,mbrubeck/servo,dati91/servo,avadacatavra/servo,dsandeephegde/servo,CJ8664/servo,sadmansk/servo,nnethercote/servo,paulrouget/servo,cbrewster/servo,pyfisch/servo,nnethercote/servo,SimonSapin/servo,SimonSapin/servo,sadmansk/servo,upsuper/servo,notriddle/servo,steveklabnik/servo,notriddle/servo,mbrubeck/servo,eddyb/servo,nrc/servo,anthgur/servo,splav/servo,ConnorGBrewster/servo,nrc/servo,nnethercote/servo,eddyb/servo,paulrouget/servo,KiChjang/servo,rnestler/servo,emilio/servo,saneyuki/servo,paulrouget/servo,SimonSapin/servo,fiji-flo/servo,dati91/servo,mattnenterprise/servo,fiji-flo/servo,mattnenterprise/servo,avadacatavra/servo,sadmansk/servo,cbrewster/servo,larsbergstrom/servo,canaltinova/servo,rnestler/servo,jimberlage/servo,saneyuki/servo,paulrouget/servo,emilio/servo,paulrouget/servo,pyfisch/servo,dsandeephegde/servo,pyfisch/servo,emilio/servo,nrc/servo,dati91/servo,canaltinova/servo,paulrouget/servo,dsandeephegde/servo,emilio/servo,cbrewster/servo,DominoTree/servo,KiChjang/servo,upsuper/servo,CJ8664/servo,dati91/servo,peterjoel/servo,CJ8664/servo,saneyuki/servo,nrc/servo,notriddle/servo,steveklabnik/servo,eddyb/servo,KiChjang/servo,sadmansk/servo,paulrouget/servo,mbrubeck/servo,szeged/servo,notriddle/servo,paulrouget/servo,KiChjang/servo,fiji-flo/servo,jimberlage/servo,fiji-flo/servo,avadacatavra/servo,KiChjang/servo,mattnenterprise/servo,nnethercote/servo,splav/servo,eddyb/servo,nnethercote/servo,steveklabnik/servo,eddyb/servo,ConnorGBrewster/servo,cbrewster/servo,fiji-flo/servo,rnestler/servo,peterjoel/servo,avadacatavra/servo,anthgur/servo,SimonSapin/servo,pyfisch/servo,KiChjang/servo,paulrouget/servo,thiagopnts/servo,KiChjang/servo,mbrubeck/servo,thiagopnts/servo