changed list to list_ because programming error in heroku

lists/templates/base.html

@@ -80,13 +80,13 @@
 
       <div class="row">
           ​<div class="col-md-6 col-md-offset-3">
-            ​{% for list in lists %}
+            ​{% for list_ in lists %}
               {{ forloop.counter }}.
               <a href="/lists/{{list.id}}">
-                {% if list.title %}
-                  {{ list.title }}
+                {% if list_.title %}
+                  {{ list_.title }}
                 {% else %}
-                  {{ list.item_set.first.text }}
+                  {{ list_.item_set.first.text }}
                 {% endif %}
               </a>
               <br />