improve some log msgs' readability

server/base/clock.rs

@@ -44,7 +44,7 @@ where
         };
         let sleep_time = Duration::seconds(1);
         warn!(
-            "sleeping for {:?} after error: {}",
+            "sleeping for {} after error: {}",
             sleep_time,
             crate::error::prettify_failure(&e)
         );

server/src/stream.rs

@@ -358,7 +358,7 @@ impl Opener for RetinaOpener {
                         deadline = tokio::time::Instant::now() + RETINA_TIMEOUT;
                         if v.loss > 0 {
                             log::warn!(
-                                "{}: lost {} RTP packets @ {:?}",
+                                "{}: lost {} RTP packets @ {}",
                                 &label,
                                 v.loss,
                                 v.start_ctx()

server/src/streamer.rs

@@ -95,7 +95,7 @@ where
             if let Err(e) = self.run_once() {
                 let sleep_time = time::Duration::seconds(1);
                 warn!(
-                    "{}: sleeping for {:?} after error: {}",
+                    "{}: sleeping for {} after error: {}",
                     self.short_name,
                     sleep_time,
                     base::prettify_failure(&e)