fix doc

common/numerated/src/tree.rs

@@ -87,7 +87,7 @@ macro_rules! debug_assert_impl {
 /// assert_eq!(voids, vec![i32::MIN..=0, 4..=4, 8..=i32::MAX]);
 ///
 /// // Difference iterator: iterate over intervals from `tree` which are not in `other_tree`.
-/// let other_tree: IntervalsTree<i32> = [3, 4, 5, 7, 8, 9].iter().collect();
+/// let other_tree: IntervalsTree<i32> = [3, 4, 5, 7, 8, 9].into_iter().collect();
 /// let difference: Vec<_> = tree.difference(&other_tree).map(RangeInclusive::from).collect();
 /// assert_eq!(difference, vec![1..=2, 6..=6]);
 /// ```