Merge pull request #564 from GSA/fix-template-when-None

Fix Template Bug

Author: cmhedrickREI

app/templates/view_source_data.html

@@ -40,7 +40,7 @@ <h2>Configuration:</h2>
                 {% elif key == 'notification_emails' %}
                 {% if session['user'] %}
                 <td>Notification emails:</td>
-                <td>{{value|join(', ')}}</td>
+                <td>{{value | default('N/A', true) | join(', ')}}</td>
                 {% endif %}
                 {% elif key == 'url' %}
                 <td>{{key}}:</td>