title: Shopify Liquid get every even block in forloop
body: <p>i am trying to get every block that has an even position in shopify liquid inside  a forloop :</p>
  <pre><code>{% for block in section.blocks %}
        {% if forloop.index | modulo : 2 == 0%}
          //some code
        {%endif%}
  {% endfor %}
  </code></pre>
  <p>but shopify returns me this error:</p>
  <blockquote>
  <p>Expected end_of_string but found pipe in &quot;forloop.index | modulo : 2
  == 0&quot;</p>
  </blockquote>
  <p>Can somone help me solve this?
  Thanks in advance :D</p>