Use variables directly inside format strings

Most systems should have an up to date Rust compiler by now, so we should be
fine.

src/model/track.rs

@@ -74,7 +74,7 @@ impl Track {
     pub fn duration_str(&self) -> String {
         let minutes = self.duration / 60_000;
         let seconds = (self.duration / 1000) % 60;
-        format!("{:02}:{:02}", minutes, seconds)
+        format!("{minutes:02}:{seconds:02}")
     }
 }
 
@@ -194,7 +194,7 @@ impl ListItem for Track {
         if left != default {
             Playable::format(&Playable::Track(self.clone()), &left, library)
         } else {
-            format!("{}", self)
+            format!("{self}")
         }
     }
 
@@ -307,7 +307,7 @@ impl ListItem for Track {
     fn share_url(&self) -> Option<String> {
         self.id
             .clone()
-            .map(|id| format!("https://open.spotify.com/track/{}", id))
+            .map(|id| format!("https://open.spotify.com/track/{id}"))
     }
 
     fn album(&self, queue: Arc<Queue>) -> Option<Album> {