Merged revisions 76806,76808 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r76806 | benjamin.peterson | 2009-12-13 13:25:34 -0600 (Sun, 13 Dec 2009) | 14 lines

  Merged revisions 76805 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

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    r76805 | benjamin.peterson | 2009-12-13 13:19:07 -0600 (Sun, 13 Dec 2009) | 7 lines

    accept None as the same as having passed no argument in file types #7349

    This is for consistency with imitation file objects like StringIO and BytesIO.

    This commit also adds a few tests, where they were lacking for concerned
    methods.
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  r76808 | benjamin.peterson | 2009-12-13 13:28:09 -0600 (Sun, 13 Dec 2009) | 9 lines

  Merged revisions 76807 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

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    r76807 | benjamin.peterson | 2009-12-13 13:27:02 -0600 (Sun, 13 Dec 2009) | 1 line

    remove unused variable
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diff --git a/Lib/test/test_fileio.py b/Lib/test/test_fileio.py
index 679ed08..d8f6225 100644
--- a/Lib/test/test_fileio.py
+++ b/Lib/test/test_fileio.py
@@ -69,6 +69,15 @@
         n = self.f.readinto(a)
         self.assertEquals(array('b', [1, 2]), a[:n])
 
+    def test_none_args(self):
+        self.f.write(b"hi\nbye\nabc")
+        self.f.close()
+        self.f = _FileIO(TESTFN, 'r')
+        self.assertEqual(self.f.read(None), b"hi\nbye\nabc")
+        self.f.seek(0)
+        self.assertEqual(self.f.readline(None), b"hi\n")
+        self.assertEqual(self.f.readlines(None), [b"bye\n", b"abc"])
+
     def testRepr(self):
         self.assertEquals(repr(self.f), "<_io.FileIO name=%r mode=%r>"
                                         % (self.f.name, self.f.mode))