title: What does the hyphen mean for a block in Twig like in {% block body -%}?
body: <p>When generating a CRUD in a Symfony2 application with Doctrine commands, generated Twig template content is defined within a Twig block this way:</p>
  
  <pre><code>{% block body -%}
  
  {% endblock %}
  </code></pre>
  
  <p>What does the hyphen in <code>-%}</code> mean? It works fine without the hyphen and I could not find anything similar in the Twig documentation.</p>