Fix clippy lint

Author: jplatte

axum-extra/Cargo.toml

@@ -29,7 +29,7 @@ allowed = [
     "http_body",
     "pin_project_lite",
     "prost",
-    "serde",
+    "serde_core",
     "tokio",
     "tokio_util",
     "tower_layer",

axum/Cargo.toml

@@ -33,7 +33,7 @@ allowed = [
     "bytes",
     "http",
     "http_body",
-    "serde",
+    "serde_core",
     "tokio",
     # for the `__private` feature
     "reqwest",
@@ -78,6 +78,7 @@ __private_docs = [
     "axum-core/__private_docs",
     # Enables upstream things linked to in docs
     "tower/full",
+    "dep:serde",
     "dep:tower-http",
 ]
 
@@ -122,6 +123,9 @@ tokio = { package = "tokio", version = "1.44", features = ["time"], optional = t
 tokio-tungstenite = { version = "0.27.0", optional = true }
 tracing = { version = "0.1", default-features = false, optional = true }
 
+# doc dependencies
+serde = { version = "1.0.211", optional = true }
+
 [dependencies.tower-http]
 version = "0.6.0"
 optional = true

axum/src/extract/path/mod.rs

@@ -710,7 +710,7 @@ mod tests {
     async fn captures_match_empty_inner_segments() {
         let app = Router::new().route(
             "/{key}/method",
-            get(|Path(param): Path<String>| async move { param.to_string() }),
+            get(|Path(param): Path<String>| async move { param.clone() }),
         );
 
         let client = TestClient::new(app);
@@ -726,7 +726,7 @@ mod tests {
     async fn captures_match_empty_inner_segments_near_end() {
         let app = Router::new().route(
             "/method/{key}/",
-            get(|Path(param): Path<String>| async move { param.to_string() }),
+            get(|Path(param): Path<String>| async move { param.clone() }),
         );
 
         let client = TestClient::new(app);
@@ -745,7 +745,7 @@ mod tests {
     async fn captures_match_empty_trailing_segment() {
         let app = Router::new().route(
             "/method/{key}",
-            get(|Path(param): Path<String>| async move { param.to_string() }),
+            get(|Path(param): Path<String>| async move { param.clone() }),
         );
 
         let client = TestClient::new(app);