Cargo clippy

tcp_relay_server/src/main.rs

@@ -43,12 +43,12 @@ async fn main() -> std::io::Result<()> {
     let args: Args = Args::parse();
     let args = Arc::new(args);
 
-    if args.ports.len() == 0 {
+    if args.ports.is_empty() {
         log::error!("No port to forward!");
         std::process::exit(2);
     }
 
-    if args.tokens.len() == 0 {
+    if args.tokens.is_empty() {
         log::error!("No tokens specified!");
         std::process::exit(3);
     }