Merged revisions 71116 via svnmerge from

Merged revisions 71116 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r71116 | r.david.murray | 2009-04-03 21:38:38 -0400 (Fri, 03 Apr 2009) | 10 lines

  Update documentation for csv module to reflect changes in code,
  specifically that it now expects unicode input (and therefore the
  paragraph about it not handling unicode is deleted, as well as
  the 'how to handle unicode' examples) and that files should
  be opened with "newline=''" instead of binary mode.  Also removed
  unused BytesIO import from test_csv.

  This addresses issue 4847.
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