remove to_string_lossy

Author: donno2048

src/tools/tidy/src/style.rs

@@ -400,7 +400,7 @@ pub fn check(path: &Path, bad: &mut bool) {
         let mut comment_block: Option<(usize, usize)> = None;
         let is_test = file.components().any(|c| c.as_os_str() == "tests")
             || file.file_stem().unwrap() == "tests";
-        let is_style = file.to_string_lossy().ends_with(file!());
+        let is_style = file.ends_with(file!());
         // scanning the whole file for multiple needles at once is more efficient than
         // executing lines times needles separate searches.
         let any_problematic_line = !is_style && !is_test && problematic_regex.is_match(contents);