Add (missing) signature to map show view

app/views/maps/show.html.erb

@@ -52,6 +52,7 @@
 				<%= link_to @map.repository.name, @map.repository %>
 			<% end %>
 		</td></tr>
+		<tr><th>Signature:</th><td><%= @map.repo_doc_ref %></td></tr>
 	</table>
 
 <% if @map.wda_map %>