copy about "following requirements" will now only show if bade.prerequisites is s set

views/badges/single.html

@@ -82,13 +82,14 @@
             <h3 id="myModalLabel">Apply for the {{badge.name}} badge</h3>
         </div>
         <div class="modal-body">
-            <h4>In order to earn this badge you need to make sure you have met the following requirements:</h4>
-
-            <ul>
-                {% for req in badge.prerequisites %}
-                    <li>{{req}}</li>
-                {% endfor %}
-            </ul>
+            {% if badge.prerequisites|length > 0 %}
+                <h4>In order to earn this badge you need to make sure you have met the following requirements:</h4>
+                <ul>
+                    {% for req in badge.prerequisites %}
+                        <li>{{req}}</li>
+                    {% endfor %}
+                </ul>
+            {% endif %}
 
             <h4>Upload photos or videos that show your work</h4>