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/hir-expand/src/db.rs

@@ -444,7 +444,7 @@ fn macro_expand(db: &dyn AstDatabase, id: MacroCallId) -> ExpandResult<Option<Ar
         // be reported at the definition site (when we construct a def map).
         Err(err) => {
             return ExpandResult::only_err(ExpandError::Other(
-                format!("invalid macro definition: {}", err).into(),
+                format!("invalid macro definition: {err}").into(),
             ))
         }
     };

crates/hir-expand/src/eager.rs

@@ -161,7 +161,7 @@ pub fn expand_eager_macro(
 
         Ok(Ok(db.intern_macro_call(loc)))
     } else {
-        panic!("called `expand_eager_macro` on non-eager macro def {:?}", def);
+        panic!("called `expand_eager_macro` on non-eager macro def {def:?}");
     }
 }
 

crates/hir-expand/src/fixup.rs

@@ -366,7 +366,7 @@ mod tests {
             fixups.append,
         );
 
-        let actual = format!("{}\n", tt);
+        let actual = format!("{tt}\n");
 
         expect.indent(false);
         expect.assert_eq(&actual);

crates/hir-expand/src/quote.rs

@@ -233,7 +233,7 @@ mod tests {
 
         let quoted = quote!(#a);
         assert_eq!(quoted.to_string(), "hello");
-        let t = format!("{:?}", quoted);
+        let t = format!("{quoted:?}");
         assert_eq!(t, "SUBTREE $\n  IDENT   hello 4294967295");
     }