Vinay Sajip email@example.com added the comment:
If None is passed, that is interpreted to mean whatever the implementation default is, and that is sys.stderr. For backwards compatibility, that won't change: and I don't see any need to update the documentation, as it makes it perfectly clear that sys.stderr will be used if None is specified. Nor do I see a need to change the default parameter value from its current value of None.
---------- resolution: -> not a bug stage: -> resolved status: open -> closed