Avoid displaying 'None'.

templates/post.html

@@ -11,7 +11,7 @@
     </time>
     <p>
       <em>
-        {{ post.summary | safe }}
+        {{ post.summary | safe if post.summary }}
       </em>
     </p>
     {% if post.image %}
@@ -21,7 +21,7 @@
   </article>
   {% if name == 'emplois' %}
     <aside>
-      <h2>{{ post.company }}</h2>
+      <h2>{{ post.company or "(Société inconnue)" }}</h2>
       <dl>
         {% if post.address %}
           <dt>Adresse</dt>

templates/posts.html

@@ -18,7 +18,7 @@
       {% if post.image %}
         <img src="{{ url_for('post_image', path=post.image) }}" alt="{{ post.title }}" />
       {% endif %}
-      {{ post.summary | safe }}
+      {{ post.summary | safe if post.summary }}
       <p><a href="{{ url_for('post', name=name, timestamp=timestamp) }}">Lire la suite…</a></p>
     </article>
   {% endfor %}