DOM serialization: fix quoting of < and > in HMTL attribute values.

LayoutTests/fast/dom/dom-parse-serialize-expected.txt

Index: LayoutTests/fast/dom/dom-parse-serialize-expected.txt
diff --git a/LayoutTests/fast/dom/dom-parse-serialize-expected.txt b/LayoutTests/fast/dom/dom-parse-serialize-expected.txt
index de44f75ad3a3b0e0ee673d33f3d18bc8009b9a4f..0e54fa602ce4c50371becd450b16c67940b74d83 100644
--- a/LayoutTests/fast/dom/dom-parse-serialize-expected.txt
+++ b/LayoutTests/fast/dom/dom-parse-serialize-expected.txt
@@ -10,7 +10,7 @@ text to parse
 <doc>
   <foo xmlns="foobar">One</foo> <x:bar xmlns:x="barfoo">Two</x:bar>
   <d id="id3">Three</d>
-<f id="&amp;&lt;&gt;">Four&amp;&lt;&gt;</f><empty/><empty></empty></doc>
+<f id="&amp;&lt;&gt;>">Four&amp;&lt;&gt;</f><empty/><empty></empty></doc>
 
 document object
 
@@ -21,4 +21,4 @@ document object serialized
 <?xml version="1.0"?><!DOCTYPE doc><doc>
   <foo xmlns="foobar">One</foo> <x:bar xmlns:x="barfoo">Two</x:bar>
   <d id="id3">Three</d>
-<f id="&amp;&lt;&gt;">Four&amp;&lt;&gt;</f><empty/><empty/></doc>
+<f id="&amp;&lt;&gt;&gt;">Four&amp;&lt;&gt;</f><empty/><empty/></doc>