Cheering Fanatic info only includes last named card

[Cguy7777]

Tested on most recent commit as I write this (266f5ee).

To reproduce: Choose a name more than once in a turn with [[Cheering Fanatic]]'s triggered ability (by copying the ability, or attacking in multiple combat phases.)

Expected result: Hovering over the card shows a list of all card names named with it this turn.
Actual result: Only the most recently named card is shown, and it's shown even after your turn ends.

It seems that ChooseACardNameEffect is written in a way that causes the card info for the previously named card to be overwritten.

Note: the actual cost reduction works properly with multiple named cards.

[github-actions]

Cheering Fanatic - (Gatherer) (Scryfall) (EDHREC)

{1}{R}
Creature — Goblin
2/2
Whenever Cheering Fanatic attacks, choose a card name. Spells with the chosen name cost {1} less to cast this turn.