[issue9184] open() doc: default value for buffering is -1, not None

[Ezio Melotti]

Ezio Melotti <ezio.melotti at gmail.com> added the comment:

I think it's still better to set it correctly. Even assuming that it will go away, if the stage is set correctly it will be easier to convert it to something else if necessary (e.g. if the stage is left on "patch review" it might be turned to "needs review" even if it gets closed).

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nosy: +ezio.melotti

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<http://bugs.python.org/issue9184>
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