```ruby
subject "FizzBuzz (1 ~ 15)"
expected <<EOS
1
2
Fizz
4
Buzz
Fizz
7
8
Fizz
Buzz
11
Fizz
13
14
FizzBuzz
EOS
```

Fix style of FizzBuzz problem example
user
```ruby
subject "FizzBuzz (1 ~ 15)"

__END__
1
2
Fizz
4
Buzz
Fizz
7
8
Fizz
Buzz
11
Fizz
13
14
FizzBuzz
```
assistant