site.py documentation does not mention special objects help, quit etc added to builtins

[stevendaprano]

The site.py documentation does not mention the special objects that it adds to builtins:

• help
• quit and exit
• license viewer
• copyright and credit strings.

(Have I missed any?) The second paragraph hints at them, saying "Importing this module will append site-specific paths to the module search path and add a few builtins" but fails to mention what those builtins are. We should add a brief section listing those added objects, and in the case of help linking to pydoc.

Linked PRs

• gh-103066: Add links and help in site.py constants #103777
• [3.13] gh-103066: Add links and help in site.py constants (GH-103777) #123762
• [3.12] gh-103066: Add links and help in site.py constants (GH-103777) #123763

[terryjreedy]

The exact additions are potentially site-specific, but we could add the current default additions as long as they are labelled as such and not as guarantees.

[stevendaprano]

How are they more site specific than everything else in the site module?

[hugovk]

I think we can close this now the PR has been merged and backported. Please re-open if still needed. Thanks!