[GAMEPLAY] Graves' Q tooltip is displaying mana cost incorrectly

With Graves' Q, End of the Line, the mana cost listed in the tooltip. Currently, the tooltip will display 50/55/60/65/70 through ranks 1-5. This isn't the case. The TRUE cost of Graves Q is actually 60/70/80/90/100. I noticed this in a regular Summoner's Rift game, and then went into a custom ARAM to test it.

How to recreate:

1. Be Graves.
2. Put a point in Q. Note that the tooltip says "50 Mana".
3. Use it, and you will see your mana pool go down by 60.
4. Keep putting points into Q, and you will see the mana cost is actually 60/70/80/90/100 instead of the displayed 50/55/60/65/70.

Fairly simple and straightforward. Let's hope it's resolved soon! :)