Bumping clippy & fixing warnings (#1024)

* Bumping clippy

* Fixing warnings found by clippy

util/Cargo.toml

@@ -27,7 +27,7 @@ crossbeam = "0.2"
 slab = "0.1"
 sha3 = { path = "sha3" }
 serde = "0.7.0"
-clippy = { version = "0.0.63", optional = true}
+clippy = { version = "0.0.64", optional = true}
 json-tests = { path = "json-tests" }
 igd = "0.4.2"
 ethcore-devtools = { path = "../devtools" }

util/src/bytes.rs

@@ -425,7 +425,7 @@ impl<'a, V1, V2, T3> ToBytesWithMap for (&'a Vec<V1>, &'a Vec<V2>, &'a T3)
 
 impl FromRawBytesVariable for Vec<u8> {
 	fn from_bytes_variable(bytes: &[u8]) -> Result<Vec<u8>, FromBytesError> {
-		Ok(bytes.clone().to_vec())
+		Ok(bytes.to_vec())
 	}
 }
 

util/src/keys/directory.rs

@@ -326,7 +326,7 @@ fn uuid_from_string(s: &str) -> Result<Uuid, UtilError> {
 
 
 #[derive(Clone)]
-/// Stored key file struct with encrypted message (`cipher_text`)
+/// Stored key file struct with encrypted message `(cipher_text)`
 /// also contains password derivation function settings (PBKDF2/Scrypt)
 pub struct KeyFileContent {
 	version: KeyFileVersion,