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/syntax/src/hacks.rs

@@ -6,7 +6,7 @@ use crate::{ast, AstNode};
 
 pub fn parse_expr_from_str(s: &str) -> Option<ast::Expr> {
     let s = s.trim();
-    let file = ast::SourceFile::parse(&format!("const _: () = {};", s));
+    let file = ast::SourceFile::parse(&format!("const _: () = {s};"));
     let expr = file.syntax_node().descendants().find_map(ast::Expr::cast)?;
     if expr.syntax().text() != s {
         return None;