tweak publi display

en/publications.markdown

@@ -7,21 +7,26 @@ subtitle: 'Publications'
 
 {% assign authors = site.data.authors %}
 
+{% if site.data.submitted %}
 # Preprints
 
 <ol reversed>
 {% for pub in site.data.submitted %}{% include publi_row.html pub=pub authors=authors %}{% endfor %}
 </ol>
+{% endif %}
 
+{% if site.data.accepted %}
 # Articles accepted for publication
 
 <ol reversed>
 {% for pub in site.data.accepted %}{% include publi_row.html pub=pub authors=authors %}{% endfor %}
 </ol>
+{% endif %}
 
+{% if site.data.published %}
 # Published articles
 
 <ol reversed>
 {% for pub in site.data.published %}{% include publi_row.html pub=pub authors=authors %}{% endfor %}
 </ol>
-
+{% endif %}