Use strict equal of length of added and removed sets against zero
Use strict equal of length of added and removed sets against zero

Addresses code review comments

rlugojr/brackets,albertinad/brackets,thehogfather/brackets,uwsd/brackets,thehogfather/brackets,Wikunia/brackets,petetnt/brackets,busykai/brackets,petetnt/brackets,Real-Currents/brackets,Wikunia/brackets,rlugojr/brackets,sprintr/brackets,zaggino/brackets-electron,adobe/brackets,albertinad/brackets,MarcelGerber/brackets,ficristo/brackets,Real-Currents/brackets,petetnt/brackets,pratts/brackets,zaggino/brackets-electron,adobe/brackets,rlugojr/brackets,zaggino/brackets-electron,albertinad/brackets,MarcelGerber/brackets,busykai/brackets,thehogfather/brackets,uwsd/brackets,pratts/brackets,Wikunia/brackets,adobe/brackets,pratts/brackets,adobe/brackets,ficristo/brackets,zaggino/brackets-electron,MarcelGerber/brackets,pratts/brackets,sprintr/brackets,petetnt/brackets,thehogfather/brackets,zaggino/brackets-electron,adobe/brackets,pratts/brackets,sprintr/brackets,uwsd/brackets,Wikunia/brackets,albertinad/brackets,busykai/brackets,ficristo/brackets,petetnt/brackets,rlugojr/brackets,Real-Currents/brackets,albertinad/brackets,busykai/brackets,Real-Currents/brackets,ficristo/brackets,thehogfather/brackets,MarcelGerber/brackets,sprintr/brackets,Real-Currents/brackets,Real-Currents/brackets,rlugojr/brackets,busykai/brackets,sprintr/brackets,uwsd/brackets,uwsd/brackets,zaggino/brackets-electron,ficristo/brackets,MarcelGerber/brackets,Wikunia/brackets