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When an Arg uses .min_values(0), that arg's value(s) are effectively
optional. This is conventionaly denoted in help messages by wrapping the
arg's values in square brackets. For example:
--foo[=value]
--bar [value]
This kind of argument can be seen in the wild in many git commands; e.g.
git-status(1).
Signed-off-by: Peter Grayson <pete@jpgrayson.net>
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| builder | ||
| derive | ||
| derive_ui | ||
| app.yml | ||
| derive_ui.rs | ||
| examples.rs | ||
| macros.rs | ||
| yaml.rs | ||