From ef5770589595e80cbd9690b64504a2166b3558fd Mon Sep 17 00:00:00 2001
From: Leonard Richardson <leonard.richardson@canonical.com>
Date: Sat, 26 Feb 2011 20:56:47 -0500
Subject: Emit an XML declaration when appropriate.

---
 beautifulsoup/builder/_lxml.py | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'beautifulsoup/builder/_lxml.py')

diff --git a/beautifulsoup/builder/_lxml.py b/beautifulsoup/builder/_lxml.py
index 4c7a826..23ac485 100644
--- a/beautifulsoup/builder/_lxml.py
+++ b/beautifulsoup/builder/_lxml.py
@@ -20,6 +20,8 @@ LXML = 'lxml'
 class LXMLTreeBuilderForXML(TreeBuilder):
     DEFAULT_PARSER_CLASS = etree.XMLParser
 
+    is_xml = True
+
     # Well, it's permissive by XML parser standards.
     features = [LXML, XML, FAST, PERMISSIVE]
 
@@ -87,10 +89,15 @@ class LXMLTreeBuilderForXML(TreeBuilder):
         self.soup.handle_data(content)
         self.soup.endData(Comment)
 
+    def test_fragment_to_document(self, fragment):
+        """See `TreeBuilder`."""
+        return u'<?xml version="1.0" encoding="utf-8">\n%s' % fragment
+
 
 class LXMLTreeBuilder(HTMLTreeBuilder, LXMLTreeBuilderForXML):
 
     features = [LXML, HTML, FAST]
+    is_xml = False
 
     @property
     def default_parser(self):
-- 
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