[3.10] gh-145455: Show output of blurb & sphinx-build version commands (GH-145457)#145489

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[3.10] gh-145455: Show output of blurb & sphinx-build version commands (GH-145457)#145489
miss-islington wants to merge 1 commit intopython:3.10from
miss-islington:backport-f1de65b-3.10

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miss-islington commentedMar 4, 2026•
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Ingh-145455, an outdated dependency caused an import error that was not
printed out (2>&1); the message instead said that the tools are missing.

Don't redirect stderr, to show warnings and failures.

Also, switchblurb to output a version on a single line (--version rather
thanhelp), and, and don't redirect stdout either.
This results in two version info lines being printed out. These get drowned
in typical Sphinx output, and can be helpful when debugging.
(cherry picked from commitf1de65b)

Co-authored-by: Petr Viktorinencukou@gmail.com

📚 Documentation preview 📚:https://cpython-previews--145489.org.readthedocs.build/

pythongh-145455: Show output of blurb & sphinx-build version commands (…

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…pythonGH-145457)Inpythongh-145455, an outdated dependency caused an import error that was notprinted out (`2>&1`); the message instead said that the tools are missing.Don't redirect stderr, to show warnings and failures.Also, switch `blurb` to output a version on a single line (`--version` ratherthan `help`), and, and don't redirect stdout either.This results in two version info lines being printed out. These get drownedin typical Sphinx output, and can be helpful when debugging.(cherry picked from commitf1de65b)Co-authored-by: Petr Viktorin <encukou@gmail.com>

This was referencedMar 4, 2026

The pinned version of Sphinx for 3.10 needs pkg_resources#145455

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gh-145455: Show output of blurb & sphinx-build version commands#145457

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