Update to Twig 3.0

index.twig

@@ -43,10 +43,12 @@
             </div>
             <div id="nav" role="navigation" tabindex="-1">
                 <ul>
-                    {% for page in pages(depthOffset=-1) if page.title and not page.hidden %}
+                    {% for page in pages(depthOffset=-1) %}
+                        {% if page.title and not page.hidden %}
                             <li{% if page.id == current_page.id %} class="active"{% endif %}>
                                 <a href="{{ page.url }}">{{ page.title }}</a>
                             </li>
+                        {% endif %}
                     {% endfor %}
                 </ul>
             </div>