implement Clone

src/position.rs

@@ -2,7 +2,7 @@ use std::error::Error;
 use std::fmt;
 use std::str::FromStr;
 
-#[derive(Debug, Eq, PartialEq)]
+#[derive(Clone, Debug, Eq, PartialEq)]
 pub struct Position {
     pub x: u8,
     pub y: u8,