Function run_from_args 

pub async fn run_from_args<I, T>(argv: I) -> i32
where
    I: IntoIterator<Item = T>,
    T: Into<OsString> + Clone,

Run the tool from an argv-style iterator, returning its exit code.

Panics

Panics if argv does not parse, which for a caller passing a literal argument list is a bug in that list rather than a runtime condition.