Whitespace normalization, via reindent.py.
diff --git a/Demo/xml/roundtrip.py b/Demo/xml/roundtrip.py
index e42bf1b..8d7d437 100644
--- a/Demo/xml/roundtrip.py
+++ b/Demo/xml/roundtrip.py
@@ -16,7 +16,7 @@
         self._out = out
 
     # ContentHandler methods
-        
+
     def startDocument(self):
         self._out.write('<?xml version="1.0" encoding="iso-8859-1"?>\n')
 
@@ -34,7 +34,7 @@
 
     def ignorableWhitespace(self, content):
         self._out.write(content)
-        
+
     def processingInstruction(self, target, data):
         self._out.write('<?%s %s?>' % (target, data))