Issue #2746: Don't escape ampersands and angle brackets ("&", "<", ">")

in XML processing instructions and comments.  These raw characters are
allowed by the XML specification, and are necessary when outputting e.g.
PHP code in a processing instruction.  Patch by Neil Muller.

1 files changed, 17 insertions, 0 deletions

diff --git a/Lib/test/test_xml_etree.py b/Lib/test/test_xml_etree.py
index 2ccb77a..8cdd4ee 100644
--- a/Lib/test/test_xml_etree.py
+++ b/Lib/test/test_xml_etree.py
@@ -213,6 +213,23 @@ def check_encoding(ET, encoding):
     """
     ET.XML("<?xml version='1.0' encoding='%s'?><xml />" % encoding)
 
+def processinginstruction():
+    """
+    Test ProcessingInstruction directly
+
+    >>> from xml.etree import ElementTree as ET
+
+    >>> ET.tostring(ET.ProcessingInstruction('test', 'instruction'))
+    '<?test instruction?>'
+    >>> ET.tostring(ET.PI('test', 'instruction'))
+    '<?test instruction?>'
+
+    Issue #2746
+
+    >>> ET.tostring(ET.PI('test', '<testing&>'))
+    '<?test <testing&>?>'
+
+    """
 
 #
 # xinclude tests (samples from appendix C of the xinclude specification)