Blocked revisions 76798-76799 via svnmerge

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  r76798 | benjamin.peterson | 2009-12-13 11:29:16 -0600 (Sun, 13 Dec 2009) | 1 line

  make StringIO like other file objects in that readline(-1) has no effect #7348
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  r76799 | benjamin.peterson | 2009-12-13 11:31:31 -0600 (Sun, 13 Dec 2009) | 1 line

  add NEWS note
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