message: Switch to new V1 magic
diff: @@ -9,7 +9,7 @@ pub(crate) mod ssh_ed25519;
  pub(crate) mod ssh_rsa;
  pub(crate) mod x25519;
  -const V1_MAGIC: &[u8] = b"This is a file encrypted with age-encryption.org/v1";
  +const V1_MAGIC: &[u8] = b"age-encryption.org/v1";
  const RECIPIENT_TAG: &[u8] = b"-> ";
  const MAC_TAG: &[u8] = b"---";
  @@ -246,7 +246,7 @@ mod tests {
  #[test]
  fn parse_header() {
  - let test_header = "This is a file encrypted with age-encryption.org/v1
  + let test_header = "age-encryption.org/v1
  -> X25519 CJM36AHmTbdHSuOQL+NESqyVQE75f2e610iRdLPEN20
  C3ZAeY64NXS4QFrksLm3EGz+uPRyI0eQsWw7LWbbYig
  -> X25519 ytazqsbmUnPwVWMVx0c1X9iUtGdY4yAB08UQTY2hNCI
  