Only show about when info is available.

Author: RubenVerborgh

lib/views/triplepatternfragments/fragment.html

@@ -120,6 +120,8 @@ <h3>Matches in <%= datasource.title %> for <em class="pattern"><%= query.pattern
 
 <%- extensions.After %>
 
+<% if (datasource.description || datasource.copyright ||
+       datasource.license || datasource.licenseUrl) { %>
 <aside id="about">
   <h3>About <%= datasource.title %></h3>
   <ul>
@@ -132,3 +134,4 @@ <h3>About <%= datasource.title %></h3>
           %></a></li><% } %>
   </ul>
 </aside>
+<% } %>