chore: fix minor clippy lints

benches/encoding/proto.rs

@@ -47,20 +47,20 @@ pub fn proto(c: &mut Criterion) {
                 });
 
             registry.register(
-                format!("my_counter{}", i),
+                format!("my_counter{i}"),
                 "My counter",
                 counter_family.clone(),
             );
             registry.register(
-                format!("my_histogram{}", i),
+                format!("my_histogram{i}"),
                 "My histogram",
                 histogram_family.clone(),
             );
 
             for j in 0_u32..100 {
                 counter_family
                     .get_or_create(&CounterLabels {
-                        path: format!("/path/{}", i),
+                        path: format!("/path/{i}"),
                         method: Method::Get,
                         some_number: j.into(),
                     })

benches/encoding/text.rs

@@ -54,12 +54,12 @@ pub fn text(c: &mut Criterion) {
             });
 
             registry.register(
-                format!("my_counter_{}", i),
+                format!("my_counter_{i}"),
                 "My counter",
                 counter_family.clone(),
             );
             registry.register(
-                format!("my_histogram_{}", i),
+                format!("my_histogram_{i}"),
                 "My histogram",
                 histogram_family.clone(),
             );

examples/axum.rs

@@ -80,7 +80,7 @@ async fn main() {
         .route("/handler", get(some_handler))
         .with_state(metrics);
     let port = 8080;
-    let listener = tokio::net::TcpListener::bind(format!("0.0.0.0:{}", port))
+    let listener = tokio::net::TcpListener::bind(format!("0.0.0.0:{port}"))
         .await
         .unwrap();
 

examples/custom-metric.rs

@@ -41,5 +41,5 @@ fn main() {
     let mut encoded = String::new();
     encode(&mut encoded, &registry).unwrap();
 
-    println!("Scrape output:\n{:?}", encoded);
+    println!("Scrape output:\n{encoded:?}");
 }

examples/hyper.rs

@@ -76,7 +76,7 @@ pub fn make_handler(
         Box::pin(async move {
             let mut buf = String::new();
             encode(&mut buf, &reg.clone())
-                .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e))
+                .map_err(std::io::Error::other)
                 .map(|_| {
                     let body = full(Bytes::from(buf));
                     Response::builder()

src/encoding/text.rs

@@ -1218,7 +1218,7 @@ mod tests {
     fn parse_with_python_client(input: String) {
         pyo3::prepare_freethreaded_python();
 
-        println!("{:?}", input);
+        println!("{input:?}");
         Python::with_gil(|py| {
             let parser = PyModule::from_code_bound(
                 py,