message: Redefine command_prelude::values in terms of ArgMatchesExt
diff: @@ -481,10 +481,7 @@ impl<'a> ArgMatchesExt for ArgMatches<'a> {
  }
  pub fn values(args: &ArgMatches<'_>, name: &str) -> Vec<String> {
  - args.values_of(name)
  - .unwrap_or_default()
  - .map(|s| s.to_string())
  - .collect()
  + args._values_of(name)
  }
  #[derive(PartialEq, PartialOrd, Eq, Ord)]
  