Fix typo and case in a recently added test
diff --git a/Lib/test/test_minidom.py b/Lib/test/test_minidom.py
index 5c09c46..126bdb1 100644
--- a/Lib/test/test_minidom.py
+++ b/Lib/test/test_minidom.py
@@ -446,7 +446,7 @@
         dom.unlink()
         self.confirm(domstr == str.replace("\n", "\r\n"))
 
-    def test_toPrettyXML_perserves_content_of_text_node(self):
+    def test_toprettyxml_preserves_content_of_text_node(self):
         str = '<A>B</A>'
         dom = parseString(str)
         dom2 = parseString(dom.toprettyxml())