Blocked revisions 86577,88203,88252 via svnmerge

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  r86577 | r.david.murray | 2010-11-20 11:33:30 -0500 (Sat, 20 Nov 2010) | 4 lines

  #1574217: only swallow AttributeErrors in isinstance, not everything.

  Patch and tests by Brian Harring, with improvements by Ralf Schmitt.
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  r88203 | r.david.murray | 2011-01-26 16:21:32 -0500 (Wed, 26 Jan 2011) | 4 lines

  #11019: Make BytesGenerator handle Message with None body.

  Bug discovery and initial patch by Victor Stinner.
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  r88252 | r.david.murray | 2011-01-30 01:21:28 -0500 (Sun, 30 Jan 2011) | 16 lines

  #9124: mailbox now accepts binary input and uses binary internally

  Although this patch contains API changes and is rather weighty for an
  RC phase, the mailbox module was essentially unusable without the patch
  since it would produce UnicodeErrors when handling non-ascii input
  at arbitrary and somewhat mysterious places, and any non-trivial amount
  of email processing will encounter messages with non-ascii bytes.
  The release manager approved the patch application.

  The changes allow binary input, and reject non-ASCII string input early
  with a useful message instead of failing mysteriously later.  Binary
  is used internally for reading and writing the mailbox files.  StringIO
  and Text file input are deprecated.

  Initial patch by Victor Stinner, validated and expanded by R. David Murray.
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