Cleaning up documentation for game.rb

[skylersidner]

This is nitpick, but important for maintaining clean code. A few lines of your program still reference its use as a Rock/Paper/Scissors only program.

In game.rb: Line 11

[StevenThiesfeld]

Thanks for pointing these out. I tried going through after every major change to update the docs, but I always had the feeling a few pieces fell through the cracks.