Note, the example isn't using two different values.

>>> 10.0 - sys.float_info.epsilon == 10.0
True

Also, I think the docs should be left as-is. The intention was to create a half-open interval. In a small way, this make the docs slightly worse.

Are you responding to a reported user problem?

Note, the example isn't using two different values.

That's right, nice catch. I'm trying to find an example:

from collections import Counter
import math
from random import uniform


start = 0
while True:
    stop = math.nextafter(start, math.inf)
    assert start != stop
    values = Counter([uniform(start, stop) for _ in range(100)])
    assert len(values) == 2
    assert start in values
    assert stop in values
    start = stop

I cannot find an example where the end is not included using the code above, do you have an example where the end is excluded?

Are you responding to a reported user problem?

Yes from docs@.

Thanks @JulienPalard for the PR, and @rhettinger for merging it 🌮🎉.. I'm working now to backport this PR to: 3.9.
🐍🍒⛏🤖

GH-25843 is a backport of this pull request to the 3.9 branch.