fix: add missing space

This way it's consistent with the previous example.

Author: tomasmiguez

src/fn/closures/closure_examples/iter_any.md

@@ -43,7 +43,7 @@ fn main() {
     // `iter()` for arrays yields `&i32`.
     println!("2 in array1: {}", array1.iter()     .any(|&x| x == 2));
     // `into_iter()` for arrays yields `i32`.
-    println!("2 in array2: {}", array2.into_iter().any(|x| x == 2));
+    println!("2 in array2: {}", array2.into_iter().any(| x| x == 2));
 }
 ```