Fold the interpreter's pathlib rendering out of the signature comparison

3.13 split pathlib internally, so a Path annotation renders as
pathlib._local.Path where 3.10 and 3.14 render pathlib.Path. The test
compares rendered signatures against expected strings, so only 3.13
disagreed — the type is the same type and no resolver's signature changed.

Folded the way the HARNESS_ROOT default already is, so the assertion stays
about the resolvers rather than about which interpreter read them. Surfaced
by the matrix moving to 3.10, 3.13 and 3.14.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019WkxmJ5ArLEaC2RDPGkbRU

Author: jerodw

tests/test_shared_baseline_resolution.py

@@ -300,11 +300,17 @@ def test_the_five_resolvers_keep_their_signatures():
     default or moved a parameter between positional and keyword-only reports a
     different string here. The `HARNESS_ROOT` default renders as the repository
     path, which would make this a machine-specific literal, so it is folded
-    back to the name it is written under.
+    back to the name it is written under. The `Path` annotation is folded for
+    the same reason and it is an interpreter difference rather than a machine
+    one: 3.13 split `pathlib` internally and renders the annotation as
+    `pathlib._local.Path`, where 3.10 and 3.14 render `pathlib.Path`. The type
+    is the same type, so the fold keeps this an assertion about the resolvers'
+    signatures rather than about which interpreter read them.
     """
     for name, expected in RESOLVER_SIGNATURES.items():
         rendered = str(inspect.signature(getattr(conftest, name)))
         rendered = rendered.replace(repr(conftest.HARNESS_ROOT), "HARNESS_ROOT")
+        rendered = rendered.replace("pathlib._local.Path", "pathlib.Path")
         assert rendered == expected, name
 
     # The control: the comparison can differ. A resolver's signature read