[issue4233] open(0, closefd=False) prints 3 warnings

[STINNER Victor]

STINNER Victor <victor.stinner at haypocalc.com> added the comment:

christian just told me that my svn repos was old. Here is an updated 
version of my patch. I now use io.open() instead of io.BufferedReader() 
in the tests.

Added file: http://bugs.python.org/file11922/fileio_closefd-2.patch

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