作品列表中的“未参与”增加tip：“该作品未被匿评”

app/views/student_work/_evaluation_un_work.html.erb

@@ -63,7 +63,11 @@
 
   <% if @homework.anonymous_comment == 0%>
     <li class="hworkList50 <%= score_color student_work.student_score%> student_score_info">
-    <%= student_work.student_score.nil? ? "未参与" : format("%.1f",student_work.student_score)%>
+      <% if student_work.student_score.nil? %>
+        <span title="该作品未被匿评">未参与</span>
+      <% else %>
+        <%=format("%.1f",student_work.student_score) %>
+      <% end %>
     <% unless student_work.student_score.nil?%>
         <span class="linkBlue">
           (<%= student_work.student_works_scores.where(:reviewer_role => 3).count%>)