Use Path instead of str if possible

jedi/inference/__init__.py

@@ -181,8 +181,6 @@ class InferenceState:
 
     def parse_and_get_code(self, code=None, path=None,
                            use_latest_grammar=False, file_io=None, **kwargs):
-        if path is not None:
-            path = str(path)
         if code is None:
             if file_io is None:
                 file_io = FileIO(path)

test/conftest.py

@@ -2,6 +2,7 @@ import os
 import sys
 import subprocess
 from itertools import count
+from pathlib import Path
 
 import pytest
 
@@ -169,7 +170,7 @@ def module_injector():
 
     def module_injector(inference_state, names, code):
         assert isinstance(names, tuple)
-        file_io = KnownContentFileIO('/foo/bar/module-injector-%s.py' % next(counter), code)
+        file_io = KnownContentFileIO(Path('/foo/bar/module-injector-%s.py') % next(counter), code)
         v = _load_python_module(inference_state, file_io, names)
         inference_state.module_cache.add(names, ValueSet([v]))