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clap/examples/tutorial_derive/04_02_validate.md
Ed Page 65b5b5f7bf fix(help): Remove name/version/author from help 
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$ 04_02_validate_derive --help
A simple to use, efficient, and full-featured Command Line Argument Parser

Usage:
    04_02_validate_derive[EXE] <PORT>

Arguments:
    <PORT>    Network port to use

Options:
    -h, --help       Print help information
    -V, --version    Print version information

$ 04_02_validate_derive 22
PORT = 22

$ 04_02_validate_derive foobar
? failed
error: Invalid value "foobar" for '<PORT>': `foobar` isn't a port number

For more information try --help

$ 04_02_validate_derive 0
? failed
error: Invalid value "0" for '<PORT>': Port not in range 1-65535

For more information try --help