still got work to do, got the first one

exercises/vecs/vecs2.rs

@@ -21,7 +21,7 @@ fn vec_map(v: &Vec<i32>) -> Vec<i32> {
     v.iter().map(|num| {
         // TODO: Do the same thing as above - but instead of mutating the
         // Vec, you can just return the new number!
-        *num = &num * 2;
+        num * 2;
     }).collect()
 }