Breaking ground for PEP 3137 implementation:

Get rid of buffer().  Use memoryview() in its place where possible.
In a few places, do things a bit different, because memoryview()
can't slice (yet).
diff --git a/Lib/test/test_marshal.py b/Lib/test/test_marshal.py
index 47e610f..3e44886 100644
--- a/Lib/test/test_marshal.py
+++ b/Lib/test/test_marshal.py
@@ -98,9 +98,9 @@
         for s in ["", "Andr\xe8 Previn", "abc", " "*10000]:
             self.helper(s)
 
-    def test_buffer(self):
+    def test_bytes(self):
         for s in [b"", b"Andr\xe8 Previn", b"abc", b" "*10000]:
-            self.helper(buffer(s))
+            self.helper(s)
 
 class ExceptionTestCase(unittest.TestCase):
     def test_exceptions(self):