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/test-utils/src/assert_linear.rs

@@ -83,7 +83,7 @@ impl Round {
 
         let a = mean_y - b * mean_x;
 
-        self.plot = format!("y_pred = {:.3} + {:.3} * x\n\nx     y     y_pred\n", a, b);
+        self.plot = format!("y_pred = {a:.3} + {b:.3} * x\n\nx     y     y_pred\n");
 
         let mut se = 0.0;
         let mut max_error = 0.0f64;

crates/test-utils/src/fixture.rs

@@ -153,7 +153,7 @@ impl Fixture {
                     && !line.contains('.')
                     && line.chars().all(|it| !it.is_uppercase())
                 {
-                    panic!("looks like invalid metadata line: {:?}", line);
+                    panic!("looks like invalid metadata line: {line:?}");
                 }
 
                 if let Some(entry) = res.last_mut() {
@@ -172,7 +172,7 @@ impl Fixture {
         let components = meta.split_ascii_whitespace().collect::<Vec<_>>();
 
         let path = components[0].to_string();
-        assert!(path.starts_with('/'), "fixture path does not start with `/`: {:?}", path);
+        assert!(path.starts_with('/'), "fixture path does not start with `/`: {path:?}");
 
         let mut krate = None;
         let mut deps = Vec::new();
@@ -184,9 +184,8 @@ impl Fixture {
         let mut introduce_new_source_root = None;
         let mut target_data_layout = None;
         for component in components[1..].iter() {
-            let (key, value) = component
-                .split_once(':')
-                .unwrap_or_else(|| panic!("invalid meta line: {:?}", meta));
+            let (key, value) =
+                component.split_once(':').unwrap_or_else(|| panic!("invalid meta line: {meta:?}"));
             match key {
                 "crate" => krate = Some(value.to_string()),
                 "deps" => deps = value.split(',').map(|it| it.to_string()).collect(),
@@ -216,7 +215,7 @@ impl Fixture {
                 }
                 "new_source_root" => introduce_new_source_root = Some(value.to_string()),
                 "target_data_layout" => target_data_layout = Some(value.to_string()),
-                _ => panic!("bad component: {:?}", component),
+                _ => panic!("bad component: {component:?}"),
             }
         }
 
@@ -253,7 +252,7 @@ impl MiniCore {
     #[track_caller]
     fn assert_valid_flag(&self, flag: &str) {
         if !self.valid_flags.iter().any(|it| it == flag) {
-            panic!("invalid flag: {:?}, valid flags: {:?}", flag, self.valid_flags);
+            panic!("invalid flag: {flag:?}, valid flags: {:?}", self.valid_flags);
         }
     }
 
@@ -263,7 +262,7 @@ impl MiniCore {
         let line = line.strip_prefix("//- minicore:").unwrap().trim();
         for entry in line.split(", ") {
             if res.has_flag(entry) {
-                panic!("duplicate minicore flag: {:?}", entry);
+                panic!("duplicate minicore flag: {entry:?}");
             }
             res.activated_flags.push(entry.to_owned());
         }
@@ -369,7 +368,7 @@ impl MiniCore {
 
         for flag in &self.valid_flags {
             if !seen_regions.iter().any(|it| it == flag) {
-                panic!("unused minicore flag: {:?}", flag);
+                panic!("unused minicore flag: {flag:?}");
             }
         }
         buf

crates/test-utils/src/lib.rs

@@ -146,8 +146,8 @@ pub fn extract_range_or_offset(text: &str) -> (RangeOrOffset, String) {
 
 /// Extracts ranges, marked with `<tag> </tag>` pairs from the `text`
 pub fn extract_tags(mut text: &str, tag: &str) -> (Vec<(TextRange, Option<String>)>, String) {
-    let open = format!("<{}", tag);
-    let close = format!("</{}>", tag);
+    let open = format!("<{tag}");
+    let close = format!("</{tag}>");
     let mut ranges = Vec::new();
     let mut res = String::new();
     let mut stack = Vec::new();
@@ -169,8 +169,7 @@ pub fn extract_tags(mut text: &str, tag: &str) -> (Vec<(TextRange, Option<String
                     stack.push((from, attr));
                 } else if text.starts_with(&close) {
                     text = &text[close.len()..];
-                    let (from, attr) =
-                        stack.pop().unwrap_or_else(|| panic!("unmatched </{}>", tag));
+                    let (from, attr) = stack.pop().unwrap_or_else(|| panic!("unmatched </{tag}>"));
                     let to = TextSize::of(&res);
                     ranges.push((TextRange::new(from, to), attr));
                 } else {
@@ -180,7 +179,7 @@ pub fn extract_tags(mut text: &str, tag: &str) -> (Vec<(TextRange, Option<String
             }
         }
     }
-    assert!(stack.is_empty(), "unmatched <{}>", tag);
+    assert!(stack.is_empty(), "unmatched <{tag}>");
     ranges.sort_by_key(|r| (r.0.start(), r.0.end()));
     (ranges, res)
 }
@@ -413,8 +412,8 @@ pub fn format_diff(chunks: Vec<dissimilar::Chunk<'_>>) -> String {
     for chunk in chunks {
         let formatted = match chunk {
             dissimilar::Chunk::Equal(text) => text.into(),
-            dissimilar::Chunk::Delete(text) => format!("\x1b[41m{}\x1b[0m", text),
-            dissimilar::Chunk::Insert(text) => format!("\x1b[42m{}\x1b[0m", text),
+            dissimilar::Chunk::Delete(text) => format!("\x1b[41m{text}\x1b[0m"),
+            dissimilar::Chunk::Insert(text) => format!("\x1b[42m{text}\x1b[0m"),
         };
         buf.push_str(&formatted);
     }