f - correct expect message

Author: jkczyz

lightning/src/offers/parse.rs

@@ -46,7 +46,7 @@ pub(crate) trait Bech32Encode: AsRef<[u8]> + TryFrom<Vec<u8>, Error=ParseError>
 	/// Formats the message using bech32-encoding.
 	fn fmt_bech32_str(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
 		bech32::encode_without_checksum_to_fmt(f, Self::BECH32_HRP, self.as_ref().to_base32())
-			.expect("HRP is valid").unwrap();
+			.expect("HRP is invalid").unwrap();
 
 		Ok(())
 	}