Get email test to pass. Barry, hope this is what you had in mind

Lib/email/_compat21.py

@@ -25,9 +25,9 @@ def walk(self):
 
 
 # Used internally by the Header class
-def _intdiv2(i):
-    """Do an integer divide by 2."""
-    return i / 2
+def _floordiv(x, y):
+    """Do integer division."""
+    return x / y