Fix guillemet manquant

src/agenda_culturel/templates/agenda_culturel/duplicate-diff-inc.html

@@ -87,7 +87,9 @@
             {% with object.get_duplicated|index:forloop.counter0 as event %}
               {% if event.local_image %}
                 <div>
-                  <img src="{{ event.get_image_url }}" class="preview" alt="{{ object.get_duplicated.0.image_alt }} />
+                  <img src="{{ event.get_image_url }}"
+                       class="preview"
+                       alt="{{ object.get_duplicated.0.image_alt }}" />
                 </div>
               {% endif %}
             {% endwith %}