fix clippy lints on all targets

Author: Firestar99

tests/difftests/bin/src/main.rs

@@ -1,3 +1,5 @@
+#![allow(clippy::exit)]
+
 use anyhow::Result;
 use std::{
     env,

tests/difftests/bin/src/runner.rs

@@ -383,7 +383,7 @@ mod tests {
             version = "0.1.0"
             edition = "2021"
         "#;
-        write!(temp, "{}", cargo_toml).expect("failed to write to temp file");
+        write!(temp, "{cargo_toml}").expect("failed to write to temp file");
         let runner = Runner::new(PathBuf::from("dummy_base"));
         let pkg_name = runner
             .get_package_name(temp.path())

tests/difftests/lib/src/lib.rs

@@ -11,7 +11,7 @@ mod tests {
     fn test_config_from_path() {
         let mut tmp = NamedTempFile::new().unwrap();
         let config_json = r#"{ "output_path": "/tmp/output.txt" }"#;
-        write!(tmp, "{}", config_json).unwrap();
+        write!(tmp, "{config_json}").unwrap();
         let config = Config::from_path(tmp.path()).unwrap();
         assert_eq!(config.output_path.to_str().unwrap(), "/tmp/output.txt");
     }