message: typo undelying -> underlying
diff: @@ -36,7 +36,7 @@ pub enum Extern {
  }
  impl Extern {
  - /// Return the undelying type of the inner `Extern`.
  + /// Return the underlying type of the inner `Extern`.
  pub fn ty(&self) -> ExternType {
  match self {
  Self::Function(ft) => ExternType::Function(ft.ty().clone()),
  