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/album.rs

@@ -170,7 +170,7 @@ impl ListItem for Album {
     }
 
     fn display_left(&self, _library: Arc<Library>) -> String {
-        format!("{}", self)
+        format!("{self}")
     }
 
     fn display_right(&self, library: Arc<Library>) -> String {
@@ -289,7 +289,7 @@ impl ListItem for Album {
     fn share_url(&self) -> Option<String> {
         self.id
             .clone()
-            .map(|id| format!("https://open.spotify.com/album/{}", id))
+            .map(|id| format!("https://open.spotify.com/album/{id}"))
     }
 
     fn artists(&self) -> Option<Vec<Artist>> {

src/model/artist.rs

@@ -95,7 +95,7 @@ impl ListItem for Artist {
     }
 
     fn display_left(&self, _library: Arc<Library>) -> String {
-        format!("{}", self)
+        format!("{self}")
     }
 
     fn display_right(&self, library: Arc<Library>) -> String {
@@ -115,7 +115,7 @@ impl ListItem for Artist {
             "".into()
         };
 
-        format!("{}{}", followed, tracks)
+        format!("{followed}{tracks}")
     }
 
     fn play(&mut self, queue: Arc<Queue>) {
@@ -199,7 +199,7 @@ impl ListItem for Artist {
     fn share_url(&self) -> Option<String> {
         self.id
             .clone()
-            .map(|id| format!("https://open.spotify.com/artist/{}", id))
+            .map(|id| format!("https://open.spotify.com/artist/{id}"))
     }
 
     #[inline]

src/model/episode.rs

@@ -25,7 +25,7 @@ impl Episode {
     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}")
     }
 }
 

src/model/playable.rs

@@ -121,7 +121,7 @@ impl Playable {
         let duration = self.duration();
         let minutes = duration / 60_000;
         let seconds = (duration / 1000) % 60;
-        format!("{:02}:{:02}", minutes, seconds)
+        format!("{minutes:02}:{seconds:02}")
     }
 
     pub fn as_listitem(&self) -> Box<dyn ListItem> {

src/model/playlist.rs

@@ -216,7 +216,7 @@ impl ListItem for Playlist {
             .map(|t| t.len())
             .unwrap_or(self.num_tracks);
 
-        format!("{}{:>4} tracks", saved, num_tracks)
+        format!("{saved}{num_tracks:>4} tracks")
     }
 
     fn play(&mut self, queue: Arc<Queue>) {

src/model/show.rs

@@ -77,7 +77,7 @@ impl ListItem for Show {
     }
 
     fn display_left(&self, _library: Arc<Library>) -> String {
-        format!("{}", self)
+        format!("{self}")
     }
 
     fn display_right(&self, library: Arc<Library>) -> String {

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> {