"Changed in version X.Y" for optional parameter strangely sticks to the current version for several past versions

[tuttle]

On the page https://docs.python.org/3.13/library/email.utils.html
there is a comment for the parameter strict at functions parseaddr() and getaddresses().

It says
Changed in version 3.13: Add strict optional parameter and reject malformed inputs by default

When I switch the Python version using the top pull down selector to 3.12, the selector shows 3.12.10, but the comment says

Changed in version 3.12.6: Add strict optional parameter and reject malformed inputs by default.

When I switch to 3.11, the selector shows 3.11.13 and the comment says

Changed in version 3.11.10: Add strict optional parameter and reject malformed inputs by default.

This repeats down to version 3.8:

Changed in version 3.8.20: Add strict optional parameter and reject malformed inputs by default.

Expected behavior: I'd prefer the message saying

Added in version 3.8: The strict optional parameter and reject malformed inputs by default.

constantly in all Python versions above it.

[AA-Turner]

This was the result of a series of security backports (#102988), so all of the "Changed in version ..." notices are correct.

A

[terryjreedy]

"Added in 3.8" implies "Added in 3.8.0 and present in all releases of subsequent versions", which is very much not true. We do not normally add features in 'bugfix-only' releases, but made an exception for a security bug. The PR authors carefully patched the docs to not claim that the feature is present in releases where it is not. What was done was an alternative to putting "Added in 3.8.20, ..., 3.12.6, 3.13." which is also awkward. Anyone only concerned with 3.13 or later does not need to know the backport details.

[tuttle]

@terryjreedy Thank you for an additional explanation.