diff --git a/_layouts/timeline_edtf.html b/_layouts/timeline_edtf.html
index 429a794b..e7a45f96 100644
--- a/_layouts/timeline_edtf.html
+++ b/_layouts/timeline_edtf.html
@@ -55,7 +55,13 @@ <h2>
   {% assign first_year = sorted_years | first | split: ':' %}
   {% assign last_year = sorted_years | last | split: ':' %}
   {% if sorted_years.size > 0 %}
-    {% if first_year.size == 2 and last_year.size == 2 and first_year[0] != '' and first_year[1] != '' and last_year[0] != '' and last_year[1] != '' %}
+    {% if first_year.size == 2
+      and last_year.size == 2
+      and first_year[0] != ''
+      and first_year[1] != ''
+      and last_year[0] != ''
+      and last_year[1] != ''
+    %}
       <a href="#y{{ first_year[1] }}">{{ first_year[0] }}</a> &#8211;
       <a href="#y{{ last_year[1]}}">{{ last_year[0] }}</a>
     {% else %}