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[3.12] gh-73231: Update documentation for PyErr_SetFromWindowsErr() (GH-117226) (GH-117973)

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(cherry picked from commit 438b7c3071)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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Doc/c-api/exceptions.rst
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@ -208,13 +208,14 @@ For convenience, some of these functions will always return a
.. c:function:: PyObject* PyErr_SetFromWindowsErr(int ierr)
This is a convenience function to raise :exc:`WindowsError`. If called with
This is a convenience function to raise :exc:`OSError`. If called with
*ierr* of ``0``, the error code returned by a call to :c:func:`!GetLastError`
is used instead. It calls the Win32 function :c:func:`!FormatMessage` to retrieve
the Windows description of error code given by *ierr* or :c:func:`!GetLastError`,
then it constructs a tuple object whose first item is the *ierr* value and whose
second item is the corresponding error message (gotten from
:c:func:`!FormatMessage`), and then calls ``PyErr_SetObject(PyExc_WindowsError,
then it constructs a :exc:`OSError` object with the :attr:`~OSError.winerror`
attribute set to the error code, the :attr:`~OSError.strerror` attribute
set to the corresponding error message (gotten from
:c:func:`!FormatMessage`), and then calls ``PyErr_SetObject(PyExc_OSError,
object)``. This function always returns ``NULL``.
.. availability:: Windows.