Return Address directly

Clippy emits:

  warning: returning the result of a `let` binding from a block

Remove the local binding, return the `Address` directly.

Author: tcharding

src/util/bip143.rs

@@ -201,8 +201,7 @@ mod tests {
 
     fn p2pkh_hex(pk: &str) -> Script {
         let pk: PublicKey = PublicKey::from_str(pk).unwrap();
-        let witness_script = Address::p2pkh(&pk, Network::Bitcoin).script_pubkey();
-        witness_script
+        Address::p2pkh(&pk, Network::Bitcoin).script_pubkey()
     }
 
     fn run_test_sighash_bip143(tx: &str, script: &str, input_index: usize, value: u64, hash_type: u32, expected_result: &str) {