Merge of the folding-reimpl-branch.  Specific changes,

Remove a senseless comment.
diff --git a/Lib/email/base64MIME.py b/Lib/email/base64MIME.py
index 56e44e1..a247773 100644
--- a/Lib/email/base64MIME.py
+++ b/Lib/email/base64MIME.py
@@ -102,9 +102,6 @@
     max_encoded = maxlinelen - len(charset) - MISC_LEN
     max_unencoded = _floordiv(max_encoded * 3, 4)
 
-    # BAW: Ben's original code used a step of max_unencoded, but I think it
-    # ought to be max_encoded.  Otherwise, where's max_encoded used?  I'm
-    # still not sure what the
     for i in range(0, len(header), max_unencoded):
         base64ed.append(b2a_base64(header[i:i+max_unencoded]))