Killed the <> operator.  You must now use !=.

Opportunistically also fixed one or two places where '<> None' should be
'is not None' and where 'type(x) <> y' should be 'not isinstance(x, y)'.
diff --git a/Lib/email/base64mime.py b/Lib/email/base64mime.py
index 0129d9d..0b29eb8 100644
--- a/Lib/email/base64mime.py
+++ b/Lib/email/base64mime.py
@@ -146,7 +146,7 @@
         # BAW: should encode() inherit b2a_base64()'s dubious behavior in
         # adding a newline to the encoded string?
         enc = b2a_base64(s[i:i + max_unencoded])
-        if enc.endswith(NL) and eol <> NL:
+        if enc.endswith(NL) and eol != NL:
             enc = enc[:-1] + eol
         encvec.append(enc)
     return EMPTYSTRING.join(encvec)