message: Fix the comment of Package::publish
diff: @@ -210,7 +210,10 @@ impl Package {
  pub fn authors(&self) -> &Vec<String> {
  &self.manifest().metadata().authors
  }
  - /// Returns `true` if the package is set to publish.
  +
  + /// Returns `None` if the package is set to publish.
  + /// Returns `Some(allowed_registries)` if publishing is limited to specified
  + /// registries or if package is set to not publish.
  pub fn publish(&self) -> &Option<Vec<String>> {
  self.manifest().publish()
  }
  