Issue #7732: Fix a crash on importing a module if a directory has the same name
than a Python module (e.g. "__init__.py"): don't close the file twice.

PyFile_FromFile() does also close the file if PyString_FromString() failed. It
did already close the file on fill_file_fields() error (e.g. if the file is a
directory).
diff --git a/Doc/c-api/file.rst b/Doc/c-api/file.rst
index bdb8c49..93f6b64 100644
--- a/Doc/c-api/file.rst
+++ b/Doc/c-api/file.rst
@@ -55,7 +55,8 @@
 
    Create a new :ctype:`PyFileObject` from the already-open standard C file
    pointer, *fp*.  The function *close* will be called when the file should be
-   closed.  Return *NULL* on failure.
+   closed.  Return *NULL* and close the file using *close* on failure.
+   *close* is optional and can be set to *NULL*.
 
 
 .. cfunction:: FILE* PyFile_AsFile(PyObject \*p)