Added OPIW OPs and made some fix (see description)

Fix some warning which appear on clippy
Fix print with 2 OPIW operations
Fix doc in mod.rs

src/main.rs

@@ -9,6 +9,6 @@ fn main() {
     let a : u8 = 128;
     let b : i8 = a as i8;
     let c : u8 = b as u8;
-    println!("aaa {}", c);
+    println!("aaa {c}");
     println!("read_memory : {}", Machine::read_memory(&mut m, 2, 4));
 }