test/xml1 - third_party/libxml2 - Git at Google

 <?xml version="1.0"?>
 <!DOCTYPE test [
 <!ENTITY example "<p>An ampersand (&#38;#38;) may be escaped
  numerically (&#38;#38;#38;) or with a general entity
   (&amp;amp;).</p>" >
 ]>
 <test>&example;</test>
	<?xml version="1.0"?>
	<!DOCTYPE test [
	<!ENTITY example "<p>An ampersand (&#38;) may be escaped
	numerically (&#38;#38;) or with a general entity
	(&amp;).</p>" >
	]>
	<test>&example;</test>