diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 30b2e7a21..a36f4b183 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -1198,6 +1198,17 @@ module ApplicationHelper
       html_safe
   end
 
+  def wiki_simple_format_without_paragraph(text)
+    text.to_s.
+        gsub(/\r\n?/, "\n").                    # \r\n and \r -> \n
+        gsub(/\n\n+/, "<br /><br />").          # 2+ newline  -> 2 br
+        gsub(/([^\n]\n)(?=[^\n])/, '\1<br />'). # 1 newline   -> br
+        gsub("&amp;nbsp", " ").           #gsub(/<\/?.*?>/,"").
+        gsub(/&lt;\/?.*?&gt;/, "").
+        gsub("&quot;", "'").
+        html_safe
+  end
+
   def lang_options_for_select(blank=true)
    { 'Chinese简体中文 '=> 'zh', :English => :en}
   end
diff --git a/app/views/wiki/diff.html.erb b/app/views/wiki/diff.html.erb
index adeaa7cab..6af69db68 100644
--- a/app/views/wiki/diff.html.erb
+++ b/app/views/wiki/diff.html.erb
@@ -29,5 +29,5 @@
 </p>
 
 <div class="text-diff" style="word-break: break-all;word-wrap: break-word;">
-  <%= simple_format_without_paragraph @diff.to_html %>
+  <%= wiki_simple_format_without_paragraph @diff.to_html %>
 </div>