Fix multiline failure

[jonathan-s]

Code that looked like this would fail with a SyntaxError. This is something that we want to avoid and we want to allow multiline text like this as this worked in prior versions.

{% component "small_button"
      theme="danger"
      icon="fa-solid fa-xmark"
      _="on click
          set replyForm to closest <form />" %}
{% endcomponent %}

[jonathan-s]

@EmilStenstrom, if you're able to take a look at this that would be great as well.