docs(derive): Update trait doc-comments (#2579)
docs(derive): Update trait doc-comments (#2579)

* docs(derive): Update trait doc-comments

* Apply suggestions from code review

Co-authored-by: Pavan Kumar Sunkara <1b5e356bb84465e3deee937143bf6a83a050649c@gmail.com>
clap-rs/clap,clap-rs/clap,clap-rs/clap