test/ent6hex - third_party/github.com/GNOME/libxml2 - Git at Google

 <!DOCTYPE doc [
 <!ENTITY lt     "&#x26;#x3c;">
 <!ENTITY gt     "&#x26;#x3E;">
 <!ENTITY amp    "&#x26;#x26;">
 <!ENTITY apos   "&#x26;#x27;">
 <!ENTITY quot   "&#x26;#x22;">
 ]>
 <doc/>
	<!DOCTYPE doc [
	<!ENTITY lt "&#x3c;">
	<!ENTITY gt "&#x3E;">
	<!ENTITY amp "&#x26;">
	<!ENTITY apos "&#x27;">
	<!ENTITY quot "&#x22;">
	]>
	<doc/>