显示问题差别的html样式

app/views/journals/diff.html.erb

@@ -2,7 +2,7 @@
 <p>由<%= @journal.user %> 更新于 <%= format_time @journal.created_on %></p>
 
 <div class="text-diff" style="word-break:break-all; word-wrap:break-word;">
-  <%= simple_format_without_paragraph @diff.to_html%>
+  <%= @diff.to_html.gsub("&lt;","<").gsub("&gt;",">").gsub("&quot;","\"").gsub("&amp;gt;", ">").gsub("&amp;lt;", "<").gsub("&amp;quot;", "\"").html_safe %>
 </div>
 
 <p><%= link_to l(:button_back), issue_path(@issue), :onclick => 'history.back(); return false;' %></p>