feat: optimize code

src/cmd_decrypt.rs

@@ -136,7 +136,8 @@ pub fn decrypt_single(config: &Option<TinyEncryptConfig>,
     Ok(meta.file_length)
 }
 
-fn decrypt_file(file_in: &mut File, file_len: u64, file_out: &mut File, key: &[u8], nonce: &[u8], compress: bool) -> XResult<u64> {
+fn decrypt_file(file_in: &mut File, file_len: u64, file_out: &mut File,
+                key: &[u8], nonce: &[u8], compress: bool) -> XResult<u64> {
     let mut total_len = 0_u64;
     let mut buffer = [0u8; 1024 * 8];
     let key = opt_result!(key.try_into(), "Key is not 32 bytes: {}");