Reverting the Revision: 77368.  I committed Flox's big patch for tests by
mistake. ( It may come in for sure tough)
diff --git a/Lib/test/test_pyexpat.py b/Lib/test/test_pyexpat.py
index ffd6875..649d5d2 100644
--- a/Lib/test/test_pyexpat.py
+++ b/Lib/test/test_pyexpat.py
@@ -554,7 +554,7 @@
 
         self.n=0
         parser.Parse(xml1, 0)
-        parser.buffer_size //= 2
+        parser.buffer_size /= 2
         self.assertEquals(parser.buffer_size, 1024)
         parser.Parse(xml2, 1)
         self.assertEquals(self.n, 4)