编程作业代码中不显示<和>

app/helpers/application_helper.rb

@@ -2345,6 +2345,6 @@ module ApplicationHelper
 
   #将文本内的/n转换为<br>
   def text_format text
-    text.gsub("\n","<br/>").html_safe
+    text.gsub("<","&lt;").gsub(">","&gt;").gsub("\n","<br/>").html_safe
   end
 end