Do not display end date if unset

cv_gen/lib/templates/cv.html.eex

@@ -145,8 +145,10 @@
             <dd lang="fr"><%= work.position %></dd>
             <dt class="start_date">Date début</dt>
             <dd><time class="start_date" datetime="<%= work.startDate %>"></time></dd>
-            <dt class="end_date">Date fin</dt>
-            <dd><time class="end_date" datetime="<%= work.endDate %>"></time></dd>
+            <%= unless is_nil(work[:endDate]) do %>
+              <dt class="end_date">Date fin</dt>
+              <dd><time class="end_date" datetime="<%= work.endDate %>"></time></dd>
+              <% end %>
             <dt class="work_location"></dt>
             <dd>Paris</dd>
           </dl>