Inline all format arguments where possible

This makes code more readale and concise,
moving all format arguments like `format!("{}", foo)`
into the more compact `format!("{foo}")` form.

The change was automatically created with, so there are far less change
of an accidental typo.

```
cargo clippy --fix -- -A clippy::all -W clippy::uninlined_format_args
```

crates/mbe/src/syntax_bridge/tests.rs

@@ -19,7 +19,7 @@ fn check_punct_spacing(fixture: &str) {
             let spacing = match annotation.as_str() {
                 "Alone" => Spacing::Alone,
                 "Joint" => Spacing::Joint,
-                a => panic!("unknown annotation: {}", a),
+                a => panic!("unknown annotation: {a}"),
             };
             (token, spacing)
         })
@@ -39,7 +39,7 @@ fn check_punct_spacing(fixture: &str) {
         cursor = cursor.bump();
     }
 
-    assert!(annotations.is_empty(), "unchecked annotations: {:?}", annotations);
+    assert!(annotations.is_empty(), "unchecked annotations: {annotations:?}");
 }
 
 #[test]