Merge pull request #732 from nuttycom/fix/clippy_lints

Fix clippy complaints.

zcash_history/examples/write.rs

@@ -32,7 +32,7 @@ fn main() {
             node.write(&mut buf).expect("Failed to write data");
         }
 
-        let mut file = std::fs::File::create(&out_file_path).expect("Failed to create output file");
+        let mut file = std::fs::File::create(out_file_path).expect("Failed to create output file");
 
         file.write_all(&buf[..])
             .expect("Failed to write data to file");

zcash_history/src/node_data.rs

@@ -248,7 +248,7 @@ mod tests {
 
     quickcheck! {
         fn serialization_round_trip(node_data: NodeData) -> TestResult {
-            TestResult::from_bool(NodeData::from_bytes(0, &node_data.to_bytes()).unwrap() == node_data)
+            TestResult::from_bool(NodeData::from_bytes(0, node_data.to_bytes()).unwrap() == node_data)
         }
     }
 }

zcash_primitives/src/transaction/components/transparent/builder.rs

@@ -294,7 +294,7 @@ impl Bundle<Unauthorized> {
 
                 // Signature has to have "SIGHASH_ALL" appended to it
                 let mut sig_bytes: Vec<u8> = sig.serialize_der()[..].to_vec();
-                sig_bytes.extend([SIGHASH_ALL as u8]);
+                sig_bytes.extend([SIGHASH_ALL]);
 
                 // P2PKH scriptSig
                 Script::default() << &sig_bytes[..] << &info.pubkey[..]

zcash_proofs/src/lib.rs

@@ -363,9 +363,8 @@ pub fn parse_parameters<R: io::Read>(
     // We only deserialize the verifying key for the Sprout parameters, which
     // appears at the beginning of the parameter file. The rest is loaded
     // during proving time.
-    let sprout_vk = sprout_fs.as_mut().map(|mut fs| {
-        VerifyingKey::<Bls12>::read(&mut fs)
-            .expect("couldn't deserialize Sprout Groth16 verifying key")
+    let sprout_vk = sprout_fs.as_mut().map(|fs| {
+        VerifyingKey::<Bls12>::read(fs).expect("couldn't deserialize Sprout Groth16 verifying key")
     });
 
     // There is extra stuff (the transcript) at the end of the parameter file which is