gh-100425: Update tutorial docs related to sum() accuracy

[neuralstring]

Related to #100426

• Issue: Improve accuracy of builtin sum() for float inputs #100425

[ghost]

All commit authors signed the Contributor License Agreement.

[arhadthedev]

Can confirm:

Running Release|x64 interpreter...
Python 3.12.0a5+ (heads/main:dfc2e065a2, Feb 12 2023, 11:14:56) [MSC v.1929 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> sum([0.1]*10) == 1.0
True
>>> 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 + 0.1 == 1.0
False

@rhettinger as an author of the referenced PR.

[rhettinger]

Please add doctest directives throughout this page. It would have been nice for this issue to have been detected automatically.

[bedevere-bot]

A Python core developer has requested some changes be made to your pull request before we can consider merging it. If you could please address their requests along with any other requests in other reviews from core developers that would be appreciated.

Once you have made the requested changes, please leave a comment on this pull request containing the phrase I have made the requested changes; please review again. I will then notify any core developers who have left a review that you're ready for them to take another look at this pull request.

[Allimuzzaman]

file your system