chore(clippy): app.rs, mime_app.rs

src/mime_app.rs

@@ -278,12 +278,12 @@ impl MimeAppCache {
 
     pub fn get(&self, key: &Mime) -> &[MimeApp] {
         static EMPTY: Vec<MimeApp> = Vec::new();
-        self.cache.get(key).unwrap_or_else(|| &EMPTY)
+        self.cache.get(key).unwrap_or(&EMPTY)
     }
 
     pub fn icons(&self, key: &Mime) -> &[widget::icon::Handle] {
         static EMPTY: Vec<widget::icon::Handle> = Vec::new();
-        self.icons.get(key).unwrap_or_else(|| &EMPTY)
+        self.icons.get(key).unwrap_or(&EMPTY)
     }
 
     pub fn terminal(&self) -> Option<&MimeApp> {
@@ -348,3 +348,9 @@ impl MimeAppCache {
         }
     }
 }
+
+impl Default for MimeAppCache {
+    fn default() -> Self {
+        Self::new()
+    }
+}