don't use 'string' as a name

src/hash.rs

@@ -19,8 +19,8 @@ use sha2::{Digest, Sha512};
 /// println!("{}", hash(data, salt));
 /// ```
 pub fn hash<D: Into<String>, S: Into<String>>(data: D, salt: S) -> String {
-	let string = salt.into() + &data.into();
-	let hash = Sha512::digest(string.as_bytes());
+	let s = salt.into() + &data.into();
+	let hash = Sha512::digest(s.as_bytes());
 	hash.iter().map(|b| format!("{:02x}", b)).collect()
 }