pub fn run(
command_name: Option<&str>,
dir: Option<&str>,
roff: bool,
) -> Result<()>Expand description
Render the manual: a readable contents page on a terminal, one command’s page when
a command is named, roff when redirected, and with --dir the full set of files —
devp.1, dev-prune.1 (the same page under the binary’s other name) and one
devp-<command>.1 per subcommand.