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diff --git a/mailman/queue/docs/switchboard.txt b/mailman/queue/docs/switchboard.txt
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-The switchboard
-===============
-
-The switchboard is subsystem that moves messages between queues.  Each
-instance of a switchboard is responsible for one queue directory.
-
-    >>> msg = message_from_string("""\
-    ... From: aperson@example.com
-    ... To: _xtest@example.com
-    ...
-    ... A test message.
-    ... """)
-
-Create a switchboard by giving its queue directory.
-
-    >>> import os
-    >>> queue_directory = os.path.join(config.QUEUE_DIR, 'test')
-    >>> from mailman.queue import Switchboard
-    >>> switchboard = Switchboard(queue_directory)
-    >>> switchboard.queue_directory == queue_directory
-    True
-
-Here's a helper function for ensuring things work correctly.
-
-    >>> def check_qfiles(directory=None):
-    ...     if directory is None:
-    ...         directory = queue_directory
-    ...     files = {}
-    ...     for qfile in os.listdir(directory):
-    ...         root, ext = os.path.splitext(qfile)
-    ...         files[ext] = files.get(ext, 0) + 1
-    ...     if len(files) == 0:
-    ...         print 'empty'
-    ...     for ext in sorted(files):
-    ...         print '{0}: {1}'.format(ext, files[ext])
-
-
-Enqueing and dequeing
----------------------
-
-The message can be enqueued with metadata specified in the passed in
-dictionary.
-
-    >>> filebase = switchboard.enqueue(msg)
-    >>> check_qfiles()
-    .pck: 1
-
-To read the contents of a queue file, dequeue it.
-
-    >>> msg, msgdata = switchboard.dequeue(filebase)
-    >>> print msg.as_string()
-    From: aperson@example.com
-    To: _xtest@example.com
-    <BLANKLINE>
-    A test message.
-    <BLANKLINE>
-    >>> dump_msgdata(msgdata)
-    _parsemsg: False
-    version  : 3
-    >>> check_qfiles()
-    .bak: 1
-
-To complete the dequeing process, removing all traces of the message file,
-finish it (without preservation).
-
-    >>> switchboard.finish(filebase)
-    >>> check_qfiles()
-    empty
-
-When enqueing a file, you can provide additional metadata keys by using
-keyword arguments.
-
-    >>> filebase = switchboard.enqueue(msg, {'foo': 1}, bar=2)
-    >>> msg, msgdata = switchboard.dequeue(filebase)
-    >>> switchboard.finish(filebase)
-    >>> dump_msgdata(msgdata)
-    _parsemsg: False
-    bar      : 2
-    foo      : 1
-    version  : 3
-
-Keyword arguments override keys from the metadata dictionary.
-
-    >>> filebase = switchboard.enqueue(msg, {'foo': 1}, foo=2)
-    >>> msg, msgdata = switchboard.dequeue(filebase)
-    >>> switchboard.finish(filebase)
-    >>> dump_msgdata(msgdata)
-    _parsemsg: False
-    foo      : 2
-    version  : 3
-
-
-Iterating over files
---------------------
-
-There are two ways to iterate over all the files in a switchboard's queue.
-Normally, queue files end in .pck (for 'pickle') and the easiest way to
-iterate over just these files is to use the .files attribute.
-
-    >>> filebase_1 = switchboard.enqueue(msg, foo=1)
-    >>> filebase_2 = switchboard.enqueue(msg, foo=2)
-    >>> filebase_3 = switchboard.enqueue(msg, foo=3)
-    >>> filebases = sorted((filebase_1, filebase_2, filebase_3))
-    >>> sorted(switchboard.files) == filebases
-    True
-    >>> check_qfiles()
-    .pck: 3
-
-You can also use the .get_files() method if you want to iterate over all the
-file bases for some other extension.
-
-    >>> for filebase in switchboard.get_files():
-    ...     msg, msgdata = switchboard.dequeue(filebase)
-    >>> bakfiles = sorted(switchboard.get_files('.bak'))
-    >>> bakfiles == filebases
-    True
-    >>> check_qfiles()
-    .bak: 3
-    >>> for filebase in switchboard.get_files('.bak'):
-    ...     switchboard.finish(filebase)
-    >>> check_qfiles()
-    empty
-
-
-Recovering files
-----------------
-
-Calling .dequeue() without calling .finish() leaves .bak backup files in
-place.  These can be recovered when the switchboard is instantiated.
-
-    >>> filebase_1 = switchboard.enqueue(msg, foo=1)
-    >>> filebase_2 = switchboard.enqueue(msg, foo=2)
-    >>> filebase_3 = switchboard.enqueue(msg, foo=3)
-    >>> for filebase in switchboard.files:
-    ...     msg, msgdata = switchboard.dequeue(filebase)
-    ...     # Don't call .finish()
-    >>> check_qfiles()
-    .bak: 3
-    >>> switchboard_2 = Switchboard(queue_directory, recover=True)
-    >>> check_qfiles()
-    .pck: 3
-
-The files can be recovered explicitly.
-
-    >>> for filebase in switchboard.files:
-    ...     msg, msgdata = switchboard.dequeue(filebase)
-    ...     # Don't call .finish()
-    >>> check_qfiles()
-    .bak: 3
-    >>> switchboard.recover_backup_files()
-    >>> check_qfiles()
-    .pck: 3
-
-But the files will only be recovered at most three times before they are
-considered defective.  In order to prevent mail bombs and loops, once this
-maximum is reached, the files will be preserved in the 'bad' queue.
-
-    >>> for filebase in switchboard.files:
-    ...     msg, msgdata = switchboard.dequeue(filebase)
-    ...     # Don't call .finish()
-    >>> check_qfiles()
-    .bak: 3
-    >>> switchboard.recover_backup_files()
-    >>> check_qfiles()
-    empty
-
-    >>> bad = config.switchboards['bad']
-    >>> check_qfiles(bad.queue_directory)
-    .psv: 3
-
-Clean up
-
-    >>> for file in os.listdir(bad.queue_directory):
-    ...     os.remove(os.path.join(bad.queue_directory, file))
-    >>> check_qfiles(bad.queue_directory)
-    empty
-
-
-Queue slices
-------------
-
-XXX Add tests for queue slices.