Mention -n in IO-section and for input/inputs

[wader]

Related to #2394

[iainelder]

@wader, did you get any more feedback on this from the maintainers?

The CI is failing for reasons unrelated to your change.

https://ci.appveyor.com/project/stedolan/jq/builds/42116887

C:\msys64\usr\bin\bash -lc "pacman-key --verify bison-3.5.4-1-x86_64.pkg.tar.xz.sig"
==> Checking bison-3.5.4-1-x86_64.pkg.tar.xz.sig...
gpg: no valid OpenPGP data found.
gpg: the signature could not be verified.
Please remember that the signature file (.sig or .asc)
should be the first file given on the command line.
==> ERROR: The signature identified by bison-3.5.4-1-x86_64.pkg.tar.xz.sig could not be verified.
Command exited with code 1
cat config.log
cat: config.log: No such file or directory

[wader]

@iainelder Nope haven't heard anything

[iainelder]

It seems we're not alone with the CI failure. It was reported at least 16 months ago in #2250. I don't see any response from the maintainers there either.

[nicowilliams]

Thanks!