Use Path() instead of str for path comparison

On Windows specifically is common to have drives diverging just by
casing ("C:" vs "c:"), depending on the cwd provided by the user.

Author: nicoddemus

src/_pytest/nodes.py

@@ -26,6 +26,7 @@
 from _pytest.mark.structures import MarkDecorator
 from _pytest.mark.structures import NodeKeywords
 from _pytest.outcomes import Failed
+from _pytest.pathlib import Path
 
 if False:  # TYPE_CHECKING
     # Imported here due to circular import.
@@ -325,7 +326,7 @@ def _repr_failure_py(
             truncate_locals = True
 
         try:
-            abspath = os.getcwd() != str(self.config.invocation_dir)
+            abspath = Path(os.getcwd()) != Path(self.config.invocation_dir)
         except OSError:
             abspath = True