Unclear what feature flags are needed for API items

[epage]

Please complete the following tasks

• I have searched the discussions
• I have searched the existing issues

Rust Version

rustc 1.55.0 (c8dfcfe04 2021-09-06)

Clap Version

v3.0.0-rc.0

Minimal reproducible code

N/A

Steps to reproduce the bug with the above code

See https://docs.rs/clap/3.0.0-rc.0/clap/macro.crate_authors.html

Actual Behaviour

Unclear you can't use it

Expected Behaviour

Tells about the feature flag

Additional Context

No response

Debug Output

No response

[epage]

Looks like there is a doc_auto_cfg attribute we can use, see rust-lang/rust#90502

[pksunkara]

AFAIK, it was supposed to be automatically enabled. Not sure why they wanted a separate attribute to enable it.