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app/helpers/application_helper.rb

@@ -12,7 +12,7 @@ module ApplicationHelper
 
   # xss共计问题
   def content_safe content
-    return nil if content.present?
+    return nil if content.blank?
     tags = %w(
         a abbr b bdo blockquote br caption cite code col colgroup dd del dfn dl
         dt em figcaption figure h1 h2 h3 h4 h5 h6 hgroup i img ins kbd li mark