anchor.diff:  					<tr>
   						<td> TODO<!-- TODO: get rank --> </td>
   						<td><%= link_to(user.display_name, user_path(user.user_id)) %></td>
  -						<td> user.score </td>
  +						<td><%= user.score %></td>
   					</tr>
   					<% end %>
   				</tbody>
  
positive.code: 					<tr>
  						<td><%= prob.problem_id %></td>
  						<td><%= link_to(prob.name, problem_path(prob.problem_id)) %></td>
  						<td> prob.score </td>
  					</tr>
  					<% end %>
  				</tbody>
  
negative.code: 					<tr>
  						<td><%= prob.problem_id %></td>
  						<td><%= link_to(prob.name, problem_path(prob.problem_id)) %></td>
  						<td><%= prob.score %></td>
  					</tr>
  					<% end %>
  				</tbody>
  