[issue18269] Clarify which integer is required in os.chmod() exception

[anatoly techtonik]

anatoly techtonik added the comment:

>>> v = open("VERSION")
>>> import os
>>> os.fchmod(v, 0664)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: an integer is required

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status: pending -> open

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18269>
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