compare article and summary contents, not their lengths

templates/index.html

@@ -40,7 +40,7 @@
       {% endif %}
       {{ article.summary }}
       <br>
-      {% if article.content|length > article.summary|length %}
+      {% if article.content != article.summary %}
         <a class="btn" href="{{ SITEURL }}/{{ article.url }}{% if not DISABLE_URL_HASH %}#{{ article.slug }}{% endif %}">{{ _('Continue reading') }}</a>
       {% endif %}
     {% else %}