Fix clippy warning: Allow calling last on DoubleEndedIterators in tests

Author: phimuemue

tests/quick.rs

@@ -450,7 +450,13 @@ quickcheck! {
         }
         assert_eq!(answer, actual);
 
-        assert_eq!(answer.into_iter().last(), a.multi_cartesian_product().last());
+        assert_eq!(
+            {
+                #[allow(clippy::double_ended_iterator_last)]
+                answer.into_iter().last()
+            },
+            a.multi_cartesian_product().last()
+        );
     }
 
     fn correct_empty_multi_product() -> () {

tests/specializations.rs

@@ -503,7 +503,10 @@ quickcheck! {
             }
 
             check_results_specialized!(it, |i| i.count());
-            check_results_specialized!(it, |i| i.last());
+            check_results_specialized!(it, |i| {
+                #[allow(clippy::double_ended_iterator_last)]
+                i.last()
+            });
             check_results_specialized!(it, |i| i.collect::<Vec<_>>());
             check_results_specialized!(it, |i| i.rev().collect::<Vec<_>>());
             check_results_specialized!(it, |i| {

tests/test_core.rs

@@ -281,6 +281,7 @@ fn count_clones() {
         let f = Foo { n: Cell::new(0) };
         let it = it::repeat_n(f, n);
         // drain it
+        #[allow(clippy::double_ended_iterator_last)]
         let last = it.last();
         if n == 0 {
             assert_eq!(last, None);