Update map.md

Author: LucaPaterlini

src/error/option_unwrap/map.md

@@ -66,8 +66,9 @@ fn main() {
     let potato = None;
 
     let cooked_apple = cook(chop(peel(apple)));
-    let cooked_carrot = cook(chop(peel(carrot)));
     // Let's try the simpler looking `process()` now.
+    let cooked_carrot = process(carrot);
+
     let cooked_potato = process(potato);
 
     eat(cooked_apple);