pathlib: make absolutepath support os.PathLike[str]

This slightly simplifies a bit of path.

Author: bluetech

src/_pytest/nodes.py

@@ -765,7 +765,7 @@ def location(self) -> Tuple[str, Optional[int], str]:
         and lineno is a 0-based line number.
         """
         location = self.reportinfo()
-        path = absolutepath(os.fspath(location[0]))
+        path = absolutepath(location[0])
         relfspath = self.session._node_location_to_relpath(path)
         assert type(location[2]) is str
         return (relfspath, location[1], location[2])

src/_pytest/pathlib.py

@@ -924,13 +924,13 @@ def visit(
             yield from visit(entry.path, recurse)
 
 
-def absolutepath(path: Union[Path, str]) -> Path:
+def absolutepath(path: "Union[str, os.PathLike[str]]") -> Path:
     """Convert a path to an absolute path using os.path.abspath.
 
     Prefer this over Path.resolve() (see #6523).
     Prefer this over Path.absolute() (not public, doesn't normalize).
     """
-    return Path(os.path.abspath(str(path)))
+    return Path(os.path.abspath(path))
 
 
 def commonpath(path1: Path, path2: Path) -> Optional[Path]: