Updated code example for results page

Otherwise, if no results found, twig produces an error message that breaks down the whole website/page.

README.md

@@ -28,12 +28,14 @@ Your template file (`search.html` in the above example) should contain something
 lists the pages matching the search (substitute `paged_pages` for `pages` if using Pico-Pagination):
 
 ```twig
-{% for page in pages %}
-<div class="search_result">
+{% if pages %}
+    {% for page in pages %}
+        <div class="search_result">
 	    <h2><a href="{{ page.url }}">{{ page.title }}</a></h2>
 	    {% if page.description %}<p>{{ page.description }}</p>{% endif %}
-</div>
-{% endfor %}
+        </div>
+    {% endfor %}
+{% endif %}
 ```
 
 Now, you should be able to visit for example `yoursite.com/search/foobar` (adjust path accordingly if putting search.md