[docs] [issue21764] Document that IOBase.__del__ calls self.close

[Nikolaus Rath]

Changes by Nikolaus Rath <Nikolaus at rath.org>:


Removed file: http://bugs.python.org/file35637/iobase2.diff

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21764>
_______________________________________