liquid doesn't make any sense

_layouts/default.html

@@ -23,7 +23,7 @@
         <p>
         <a href="{{ site.github.url }}">Home</a><br />
         {% for page in site.pages %}
-          {% if "{{ page.url | slice: -5,5 }}" == ".html" %}
+          {% if page.url contains ".html" %}
             {% unless page.tags contains "dontlink" %}
               <a href="{{ page.url }}">{{ page.title }}</a><br />
             {% endunless %}