[Text or Gameplay] Berserker Style leveling between charges?

Sparrows

Green Slime
When leveling Berserker Style it says "Damage+" which probably means increases damage when its active, but actually does nothing. If its just text bug then its means leveling Berseker Style between charges is just a waste :\
I'd like to see something really increasing with skill level rather than nothing and removing this "Damage+"
 
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