twig markup breaks nested blocks

[jonathan-blimke]

When formatting my twig markup like the following it breaks:

 {% block main %}
    <main class="{% block main_classes %} foo {% endblock %}">
       <h1>bar</h1>
    </main>
{% endblock %}

markup after formatting looks like this:
The issue here is, that the class attribute is within a new line after the opening tag

{% block main %}
<main>
    class="{% block main_classes %} foo {% endblock %}"
        <h1>bar</h1>
    </main>
{% endblock %}

Pretty Formatter v0.2.2
pasted from settings.json:
"pretty-formatter.braces": true, "pretty-formatter.braceStyle": "collapse", "pretty-formatter.commentLine": true, "pretty-formatter.styleguide": "airbnb", "pretty-formatter.forceAttribute": true,