[Bug #1472827] Make saxutils.XMLGenerator handle \r\n\t in attribute values by…

[Bug #1472827] Make saxutils.XMLGenerator handle \r\n\t in attribute values by escaping them properly.   2.4 bugfix candidate.

Lib/test/test_sax.py

@@ -175,11 +175,14 @@ def test_xmlgen_attr_escape():
     gen.endElement("e")
     gen.startElement("e", {"a": "'\""})
     gen.endElement("e")
+    gen.startElement("e", {"a": "\n\r\t"})
+    gen.endElement("e")
     gen.endElement("doc")
     gen.endDocument()
 
-    return result.getvalue() == start \
-           + "<doc a='\"'><e a=\"'\"></e><e a=\"'&quot;\"></e></doc>"
+    return result.getvalue() == start + ("<doc a='\"'><e a=\"'\"></e>"
+                                         "<e a=\"'&quot;\"></e>"
+                                         "<e a=\"&#10;&#13;&#9;\"></e></doc>")
 
 def test_xmlgen_ignorable():
     result = StringIO()

Lib/xmlcore/sax/saxutils.py

@@ -68,6 +68,8 @@ def quoteattr(data, entities={}):
     the optional entities parameter.  The keys and values must all be
     strings; each key will be replaced with its corresponding value.
     """
+    entities = entities.copy()
+    entities.update({'\n': '
', '\r': '
', '\t':'	'})
     data = escape(data, entities)
     if '"' in data:
         if "'" in data: