bpo-44967: pydoc: return non-zero exit code when query is not found

[gpanders]

https://bugs.python.org/issue44967

[the-knights-who-say-ni]

Hello, and thanks for your contribution!

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@gpanders

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[ambv]

Hi @gpanders, thanks for your contribution! I'm assuming you filled out the CLA and we're waiting for it to clear. In the mean time, your PR will definitely need updated tests and a NEWS entry.

[gpanders]

The CLA is signed and I have a test written, but I'm not sure where to put the NEWS file. Misc/NEWS.d/next/Tools-Demos/ seems like the right place, but it looks like the filenames each have some kind of 6 character identifier that I'm unsure how to generate.

[ambv]

It's probably easiest to put a NEWS entry using this app:

https://blurb-it.herokuapp.com/

[gpanders]

Thanks! Blurb added.

[iritkatriel]

I think this PR may have caused #98374.