Rollup merge of rust-lang#122126 - workingjubilee:every-os-in-the-world-belongs-to-unix, r=ChrisDenton

Fix `tidy --bless` on  ̶X̶e̶n̶i̶x̶ Windows

As reported in rust-lang#120628 (comment) the requested `tidy --bless` implementation didn't take into account the fact that earlier the linting code canonicalized things to use the OS path separator. This makes it so that the path separator is always rewritten back as '/', which should fix the variance there.

r? ``@ChrisDenton``

Author: GuillaumeGomez

Diff for: src/tools/tidy/src/ui_tests.rs

@@ -190,7 +190,11 @@ pub fn check(path: &Path, bless: bool, bad: &mut bool) {
         let blessed_issues_path = tidy_src.join("issues_blessed.txt");
         let mut blessed_issues_txt = fs::File::create(&blessed_issues_path).unwrap();
         blessed_issues_txt.write(issues_txt_header.as_bytes()).unwrap();
-        for filename in allowed_issue_names.difference(&remaining_issue_names) {
+        // If we changed paths to use the OS separator, reassert Unix chauvinism for blessing.
+        for filename in allowed_issue_names
+            .difference(&remaining_issue_names)
+            .map(|s| s.replace(std::path::MAIN_SEPARATOR_STR, "/"))
+        {
             write!(blessed_issues_txt, "\"{filename}\",\n").unwrap();
         }
         write!(blessed_issues_txt, "]\n").unwrap();