[docs] [issue9002] Add a pointer on where to find a better description of PyFile_FromFd arguments

[Ezio Melotti]

Changes by Ezio Melotti <ezio.melotti at gmail.com>:


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dependencies: +PyFile_FromFd wrong documentation
stage:  -> patch review

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue9002>
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