gh-151833: List additional documentation make targets

[Neiland85]

Closes #151833.

Doc/README.rst lists the available documentation make targets, but it did not mention texinfo, doctest, or gettext.

These targets are defined in Doc/Makefile and are part of the documentation build tooling. This change updates the README target list so it is more complete for contributors reading the documentation build instructions.

Validation performed:

• make check from Doc/
• git diff --check

This is a documentation-only change.

• Issue: Doc README omits some documentation make targets #151833

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[StanFromIreland]

I would suggest moving all of these to https://devguide.python.org/documentation/start-documenting/#documenting, and pointing people there. The Devguide already has more detailed build instructions for several targets, which would be of more help to contributors.

[Neiland85]

Thanks for the review. I can either keep this PR scoped to Doc/README.rst and add the missing linklint target, or rework it to point readers to the Devguide if that is preferred.

[StanFromIreland]

Ok, for now just add linklint and check if any other things are missing. We'll do the devguide in a later commit.

[Neiland85]

Thanks. I checked the current tree: linklint is configured as the optional linklint.ext Sphinx extension and is listed as a documentation dependency, but there is no make linklint target in Doc/Makefile.

Should linklint be documented in this README despite not being a make target, or did you mean linkcheck?

[StanFromIreland]

See my comment above, please add it at that location.

[StanFromIreland]

I'm sorry, but are my review comments in #151832 (comment) not visible?

[Neiland85]

Yes, the review comments are visible. Sorry for the delay.

linklint is not a make target. I had placed it in the targets list by mistake. It is now listed with the other PyPI tools, next to Sphinx / blurb / python-docs-theme, as sphinx-linklint.

texinfo, doctest, and gettext stay in the make-target list because those targets exist in Doc/Makefile.

[read-the-docs-community]

Documentation build overview

📚 cpython-previews | 🛠️ Build #34774512 | 📁 Comparing 6c3771b against main (1b9fe5c)

  🔍 Preview build  

424 files changed · + 12 added · ± 411 modified · - 1 deleted

+ Added

• builtins/constants.html
• builtins/exceptions.html
• builtins/functions.html
• builtins/index.html
• builtins/stdtypes.html
• builtins/threadsafety.html
• builtins/time-complexity.html
• library/asyncio-tools.html
• library/time-complexity.html
• library/tkinter.dialogs.html
• and 2 more...

± Modified

• glossary.html
• index.html
• license.html
• py-modindex.html
• c-api/arg.html
• c-api/bool.html
• c-api/buffer.html
• c-api/bytearray.html
• c-api/bytes.html
• c-api/capsule.html
• and 401 more...

- Deleted

• library/asyncio-policy.html