Unified diff viewer for attached files with .patch or .diff extension (#1403).

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1516 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/attachments_helper.rb

@@ -22,4 +22,8 @@ module AttachmentsHelper
       render :partial => 'attachments/links', :locals => {:attachments => attachments, :options => options}
     end
   end
+  
+  def to_utf8(str)
+    str
+  end
 end