fix clippy::clone_on_copy in tests

Author: hellow554

tests/specializations.rs

@@ -129,7 +129,7 @@ quickcheck! {
             check_results_specialized!(it, |i| {
                 let mut parameters_from_fold = vec![];
                 let fold_result = i.fold(vec![], |mut acc, v| {
-                    parameters_from_fold.push((acc.clone(), v.clone()));
+                    parameters_from_fold.push((acc.clone(), v));
                     acc.push(v);
                     acc
                 });
@@ -139,7 +139,7 @@ quickcheck! {
                 let mut parameters_from_all = vec![];
                 let first = i.next();
                 let all_result = i.all(|x| {
-                    parameters_from_all.push(x.clone());
+                    parameters_from_all.push(x);
                     Some(x)==first
                 });
                 (parameters_from_all, all_result)

tests/test_std.rs

@@ -1110,7 +1110,7 @@ fn fold_while() {
     let vec = vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
     let sum = vec.into_iter().fold_while(0, |acc, item| {
         iterations += 1;
-        let new_sum = acc.clone() + item;
+        let new_sum = acc + item;
         if new_sum <= 20 {
             FoldWhile::Continue(new_sum)
         } else {