don't check style_file even relatively

Author: donno2048

src/tools/tidy/src/style.rs

@@ -333,6 +333,7 @@ pub fn check(path: &Path, bad: &mut bool) {
         .case_insensitive(true)
         .build()
         .unwrap();
+    let style_file = Path::new(file!());
     walk(path, skip, &mut |entry, contents| {
         let file = entry.path();
         let filename = file.file_name().unwrap().to_string_lossy();
@@ -400,7 +401,7 @@ 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.ends_with(file!());
+        let is_style = file.ends_with(style_file) || 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);