The Goldfish Chronicles

If you’re using Ruby 1.8.6, try the following:

irb
require 'rexml/document'
REXML::Document.new("<foo x='&amp;'/>").to_s

In 1.8.5 I get an answer of "<foo x='&amp;'/>", in 1.8.6 it is "<foo x='&amp;amp;'/>, ie) entities are doubly escaped when they shouldn’t be.

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