Changing the attack damage tooltip of an item

I want to be able to change the tooltip for the attack damage of a weapon

Like the attack damage shown here. The item I have does damage that ramps up over time. I figured that actively changing the text there would be difficult, so I was wondering if I could change that text to say something like 4-16 Attack Damage? If it is possible, what would I have to change/add in the item's code to do so?