Twig code in owl-carousel shortcode

If I pack twig code within an OWL element, an empty carousel element is created for each div container.

I grab flex objects and go over them in a for loop. There are three elements in the flex.
```
{% set flex = grav.get('flex') %}
{% set directory = flex.directory('news') %}
{% set news = directory.collection() %}

[owl-carousel` items=1 margin=10 loop=false nav=true responsive={0:{items:1},600:{items:2},1000:{items:3}}]

{% for eintrag in news.filterBy({published: true}).limit(0, 10) %}

{% endfor %}

[/owl-carousel]
```

The HTML-Output looks like this:
```

```

I have no idea, where the `

`'s come from. It looks like a bug.

Many regards!

Reproduce the Twig loop inside the OWL carousel shortcode using the provided Grav snippet, then inspect the generated carousel HTML and trace where the empty

elements are introduced. Done means the loop renders only the intended news elements without empty carousel items; verify the result against the reported output.

Written by the indexing model from the issue text.