GitHub shows that that note hasn't changed in 10 years: https://github.com/python/cpython/blame/master/Doc/reference/datamodel.rst#L2210

On Mon, Apr 24, 2017 at 3:15 PM, Terry Reedy <tjreedy@udel.edu> wrote:
On 4/24/2017 12:14 PM, Stephan Hoyer wrote:

Based on the change in the documentation between 2.x and 3.x, I wonder if this is something that someone intended to clean up as part of Python 3000 but never got around to. I would love to hear from anyone familiar with the historical context here.

We should ask the intention of the person who made the change, which is in the repository.  If you email me the doc (the last part of the url) and location within, I will look it up.

--
Terry Jan Reedy


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