Added --include-ignored to cargo test options

[trevarj]

This option has been stabilized in rust-lang/rust#80053

[rust-highfive]

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[ehuss]

Thanks for the PR! However, the man pages document the options of cargo, not the test harness. Currently, I don't think there is any online documentation for the test harness (only the output from cargo test -- --help which is documented here).

I have felt it would be good to have libtest-specific documentation somewhere. The rustc book might be as good as place as any, and then the cargo docs could link to that. Do you have any interest in working on that? If not, that's ok.

[trevarj]

@ehuss Hi, I don't think I'm well-versed enough in libtest / rustc for this. I just simply spent an embarrassing amount of time looking for --include-ignored 😞

Feel free to close this!

[ehuss]

No worries. I just posted rust-lang/rust#82350 to try to fill that hole.