clippy fix.

http-rate/src/error.rs

@@ -68,9 +68,9 @@ mod test {
     #[test]
     fn coverage() {
         let display_output = format!("{}", InsufficientCapacity(3));
-        assert!(display_output.contains("3"));
+        assert!(display_output.contains('3'));
         let debug_output = format!("{:?}", InsufficientCapacity(3));
-        assert!(debug_output.contains("3"));
+        assert!(debug_output.contains('3'));
         assert_eq!(InsufficientCapacity(3), InsufficientCapacity(3));
     }
 }

http-rate/src/lib.rs

@@ -1,4 +1,4 @@
-// #![allow(unused)]
+#![allow(clippy::declare_interior_mutable_const)]
 
 mod error;
 mod gcra;
@@ -72,8 +72,8 @@ fn maybe_forwarded(headers: &HeaderMap) -> Option<IpAddr> {
         .get_all(FORWARDED)
         .iter()
         .filter_map(|h| h.to_str().ok())
-        .map(|val| val.split(';').into_iter().map(|p| p.split(',')).flatten())
-        .flatten()
+        .flat_map(|val| val.split(';'))
+        .flat_map(|p| p.split(','))
         .map(|val| val.trim().splitn(2, '='))
     {
         if let (Some(name), Some(val)) = (val.next(), val.next()) {

web/src/middleware/rate_limit.rs

@@ -49,7 +49,7 @@ impl<S, E> Service<Result<S, E>> for RateLimit {
     async fn call(&self, res: Result<S, E>) -> Result<Self::Response, Self::Error> {
         res.map(|service| RateLimitService {
             service,
-            rate_limit: http_rate::RateLimit::new(self.0.clone()),
+            rate_limit: http_rate::RateLimit::new(self.0),
         })
     }
 }