ISTWCMS-4818: check if all pieces of education exist, to avoid double commas like in 'dberry'

source/_patterns/03-layouts/ofis/ofis.twig

@@ -43,8 +43,20 @@
   <h2>Education</h2>
   <ul>
     {% for degree in ofis_data.education %}
-      <li>{{ degree.degree_yr }}, {{ degree.degree_name }}, {{ degree.name_of_discipline }}
-        , {{ degree.institution }}</li>
+      <li>
+        {% if degree.degree_yr %}
+          {{ degree.degree_yr }},
+        {% endif %}
+        {% if degree.degree_name %}
+          {{ degree.degree_name }},
+        {% endif %}
+        {% if degree.name_of_discipline %}
+          {{ degree.name_of_discipline }},
+        {% endif %}
+        {% if degree.institution %}
+          {{ degree.institution }}
+        {% endif %}
+      </li>
     {% endfor %}
   </ul>
 {% endif %}