Make use statement visible

Author: Jeff

library/core/src/iter/traits/collect.rs

@@ -38,7 +38,7 @@
 /// [`Iterator::collect()`]:
 ///
 /// ```
-/// # use std::collections::VecDeque;
+/// use std::collections::VecDeque;
 /// let first = (0..10).collect::<VecDeque<i32>>();
 /// let second = VecDeque::from_iter(0..10);
 ///