Layout breaks after inserting a newline into a code block

[rulojuka]

This code works:

##Exercícios

1. Xpto
```
<div>
  <button type="submit">Cadastrar</button>
</div>
@section Scripts {
}
```

This code breaks:

##Exercícios

1. Xpto
```
<div>
  <button type="submit">Cadastrar</button>
</div>

@section Scripts {
}
```