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/ide/src/markup.rs

@@ -33,6 +33,6 @@ impl Markup {
         self.text.as_str()
     }
     pub fn fenced_block(contents: &impl fmt::Display) -> Markup {
-        format!("```rust\n{}\n```", contents).into()
+        format!("```rust\n{contents}\n```").into()
     }
 }