style: fixing clippy new rules

src/exporters/json.rs

@@ -284,7 +284,7 @@ impl JsonExporter {
             let metric_disk_name = m.attributes.get("disk_name").unwrap();
             if let Some(disk) = res.iter_mut().find(|x| metric_disk_name == &x.disk_name) {
                 info!("editing disk");
-                disk.disk_name = metric_disk_name.clone();
+                disk.disk_name.clone_from(metric_disk_name);
                 if m.name == "scaph_host_disk_available_bytes" {
                     disk.disk_available_bytes = m.metric_value.to_string();
                 } else if m.name == "scaph_host_disk_total_bytes" {

src/exporters/mod.rs

@@ -131,7 +131,7 @@ pub struct MetricGenerator {
     /// Tells MetricGenerator if it has to watch for containers.
     #[cfg(feature = "containers")]
     watch_containers: bool,
-    ///
+    /// Last time, containers state has been checked.
     #[cfg(feature = "containers")]
     containers_last_check: String,
     /// `containers` contains the containers descriptions when --containers is true
@@ -155,7 +155,7 @@ pub struct MetricGenerator {
     /// Kubernetes pods
     #[cfg(feature = "containers")]
     pods: Vec<Pod>,
-    ///
+    /// Last time pods state has been checked.
     #[cfg(feature = "containers")]
     pods_last_check: String,
 }

src/sensors/mod.rs

@@ -977,7 +977,7 @@ pub struct CPUSocket {
     pub cpu_cores: Vec<CPUCore>,
     /// Usage statistics records stored for this socket.
     pub stat_buffer: Vec<CPUStat>,
-    ///
+    /// Sensor-specific data that has been stored at the topology generation step.
     #[allow(dead_code)]
     pub sensor_data: HashMap<String, String>,
 }
@@ -1351,7 +1351,7 @@ pub struct Domain {
     pub record_buffer: Vec<Record>,
     /// Maximum size of record_buffer, in kilobytes
     pub buffer_max_kbytes: u16,
-    ///
+    /// Sensor-specific data that has been stored at the topology generation step.
     #[allow(dead_code)]
     sensor_data: HashMap<String, String>,
 }