some clippy warnings

2023/day-6/src/part1.rs

@@ -44,7 +44,7 @@ fn parse_input(input: &str) -> IResult<&str, Vec<(u64, u64)>> {
         input,
         time.iter()
             .interleave(distance.iter())
-            .map(|x| *x)
+            .copied()
             .tuples()
             .collect(),
     ))

2023/day-6/src/part2.rs

@@ -36,13 +36,13 @@ fn parse_input(input: &str) -> IResult<&str, (u64, u64)> {
     )(input)?;
     let distance = distance
         .iter()
-        .map(|x| x.to_string())
+        .map(ToString::to_string)
         .join("")
         .parse::<u64>()
         .expect("is a number");
     let time = time
         .iter()
-        .map(|x| x.to_string())
+        .map(ToString::to_string)
         .join("")
         .parse::<u64>()
         .expect("is a number");