message: mark the result of verify as must_use
diff: @@ -90,6 +90,7 @@ impl<A: VerificationAlgorithm, T> Signature<T, A> {
  }
  impl<A: VerificationAlgorithm, T: AsRef<[u8]>> Signature<T, A> {
  + #[must_use]
  pub fn verify(&self, publickey: &key::PublicKey<A>, object: &T) -> Verification {
  <A as VerificationAlgorithm>::verify_bytes(&publickey.0, &self.signdata, object.as_ref())
  }
  