first commit

Not sure what this is trying to achieve with passing an argument to `all_stats` and then setting its value to the value of the instance variable `@stats`.  You can just use the instance variable `@stats` directly.

It might be more conventional to call this method `to_s` and have it return a string representation of a player.  It's common for classes to define a `to_s` method, for example if you want to convert a number to a string you can do

```ruby
irb(main):004:0> 2.to_s
=> "2"
```

Equivalently you might want

```ruby
player = Player.new("firstname", ...)
player.to_s
=> "firstname ..."
```