Integration: #2699 describe the read-only refusal in the Windows staging test

crates/ui-egui/src/editing.rs

@@ -1226,8 +1226,8 @@ mod tests {
         let _ = std::fs::remove_dir_all(&dir);
     }
 
-    /// Windows refuses to replace a read-only file, so the rename fails: the staging file must not
-    /// be left behind.
+    /// A read-only target is refused before anything is staged, so no staging file is left
+    /// behind.
     #[cfg(windows)]
     #[test]
     fn a_failed_save_removes_the_staging_file() {
@@ -1238,7 +1238,7 @@ mod tests {
         perms.set_readonly(true);
         std::fs::set_permissions(&target, perms.clone()).unwrap();
         let e = write_atomically_with(&target.to_string_lossy(), b"NEW", [7]).unwrap_err();
-        assert_eq!(e.kind(), std::io::ErrorKind::PermissionDenied, "the rename failed: {e}");
+        assert_eq!(e.kind(), std::io::ErrorKind::PermissionDenied, "a read-only target is refused: {e}");
         assert_eq!(read(&target), "OLD");
         assert_eq!(listing(&dir), ["out.pdf"], "the staging file was removed");
         #[allow(clippy::permissions_set_readonly_false)]