[issue23752] Cleanup io.FileIO

[STINNER Victor]

STINNER Victor added the comment:

The previous change related to fstat() is the changeset 3b5279b5bfd1 from the issue #21679. The changeset introduces the private _blksize attribute. The strange thing is that the changelog is:
"Issue #21679: Prevent extraneous fstat() calls during open().  Patch by Bohuslav Kabrda."

fstat() was called twice and it is still called twice. Maybe I missed something.

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<http://bugs.python.org/issue23752>
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