From 367481903a56a89eee2bffa5a27f8b9c75bfd40f Mon Sep 17 00:00:00 2001
From: Josh Stone <cuviper@gmail.com>
Date: Fri, 27 Oct 2023 12:23:21 -0700
Subject: [PATCH] Fix not(u64_digit) U32Digits::next_back for MSRV 1.31

---
 src/biguint/iter.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/biguint/iter.rs b/src/biguint/iter.rs
index 1e673e45..1bb701be 100644
--- a/src/biguint/iter.rs
+++ b/src/biguint/iter.rs
@@ -156,7 +156,7 @@ impl Iterator for U32Digits<'_> {
 #[cfg(not(u64_digit))]
 impl DoubleEndedIterator for U32Digits<'_> {
     fn next_back(&mut self) -> Option<Self::Item> {
-        self.it.next_back().copied()
+        self.it.next_back().cloned()
     }
 }