Big email 3.0 API changes, with updated unit tests and documentation.

Briefly (from the NEWS file):

- Updates for the email package:
  + All deprecated APIs that in email 2.x issued warnings have been removed:
    _encoder argument to the MIMEText constructor, Message.add_payload(),
    Utils.dump_address_pair(), Utils.decode(), Utils.encode()
  + New deprecations: Generator.__call__(), Message.get_type(),
    Message.get_main_type(), Message.get_subtype(), the 'strict' argument to
    the Parser constructor.  These will be removed in email 3.1.
  + Support for Python earlier than 2.3 has been removed (see PEP 291).
  + All defect classes have been renamed to end in 'Defect'.
  + Some FeedParser fixes; also a MultipartInvariantViolationDefect will be
    added to messages that claim to be multipart but really aren't.
  + Updates to documentation.

1 files changed, 11 insertions, 7 deletions

diff --git a/Lib/email/Errors.py b/Lib/email/Errors.py
index e233219..e13a2c7 100644
--- a/Lib/email/Errors.py
+++ b/Lib/email/Errors.py
@@ -1,5 +1,6 @@
 # Copyright (C) 2001-2004 Python Software Foundation
-# Author: barry@python.org (Barry Warsaw)
+# Author: Barry Warsaw
+# Contact: email-sig@python.org
 
 """email package exception classes."""
 
@@ -33,17 +34,20 @@ class MessageDefect:
     def __init__(self, line=None):
         self.line = line
 
-class NoBoundaryInMultipart(MessageDefect):
+class NoBoundaryInMultipartDefect(MessageDefect):
     """A message claimed to be a multipart but had no boundary parameter."""
 
-class StartBoundaryNotFound(MessageDefect):
+class StartBoundaryNotFoundDefect(MessageDefect):
     """The claimed start boundary was never found."""
 
-class FirstHeaderLineIsContinuation(MessageDefect):
+class FirstHeaderLineIsContinuationDefect(MessageDefect):
     """A message had a continuation line as its first header line."""
 
-class MisplacedEnvelopeHeader(MessageDefect):
+class MisplacedEnvelopeHeaderDefect(MessageDefect):
     """A 'Unix-from' header was found in the middle of a header block."""
 
-class MalformedHeader(MessageDefect):
-    """Found a header that was missing a colon, or was otherwise malformed"""
+class MalformedHeaderDefect(MessageDefect):
+    """Found a header that was missing a colon, or was otherwise malformed."""
+
+class MultipartInvariantViolationDefect(MessageDefect):
+    """A message claimed to be a multipart but no subparts were found."""