TST: use path anchor instead of drive + root.

Co-authored-by: Matt Gebert <[email protected]>

Author: rossbar

numpydoc/tests/hooks/test_utils.py

@@ -23,10 +23,9 @@ def test_find_project_root(tmp_path, request, reason_file, files, expected_reaso
         (tmp_path / reason_file).touch()
 
     if files:
-        if expected_reason == "file system root":
-            expected_dir = Path(tmp_path.drive + tmp_path.root)
-        else:
-            expected_dir = tmp_path
+        expected_dir = (
+            Path(tmp_path.anchor) if expected_reason == "file system root" else tmp_path
+        )
 
         for file in files:
             (tmp_path / file).touch()