"without injury" is probably defined so any physical attack that doesn't have a broken bone or amputation, e.g. 99% of all assaults that are bruises, lacerations that bleed but heal, etc. wouldn't be "injury". So assaulting a stranger you don't like the look of or beating your child who "isn't right" is now not punishable.

Clearly freedom and righteousness's heart grew 3 sizes this day.

Psychopaths.