{% for item in site.navigation_links %}
  <a class="nav-menu-item{% if page.url == item.url %} active{% endif %}"<a href="{{ item.url }}">{{ item.title }}</a>
{% endfor %}

{% for item in site.navigation_links %}
  <a class="nav-menu-item{% if page.url == item.url %} active{% endif %}" href="{{ item.url }}">{{ item.title }}</a>
{% endfor %}

Fix bad tag in nav bar
Fix bad tag in nav bar

Minor edit that resolves errors on each generated page
