Add missing Debug derive to vec::IntoIter

Author: zeenix

src/vec/mod.rs

@@ -1444,6 +1444,7 @@ impl<T, LenT: LenType, const N: usize> FromIterator<T> for Vec<T, N, LenT> {
 /// An iterator that moves out of an [`Vec`][`Vec`].
 ///
 /// This struct is created by calling the `into_iter` method on [`Vec`][`Vec`].
+#[derive(Debug)]
 pub struct IntoIter<T, const N: usize, LenT: LenType> {
     vec: Vec<T, N, LenT>,
     next: LenT,