Fix Sphinx 6 compatibility in conftest.py rootdir fixture

The sphinx.testing.path.path object in Sphinx <7.2 doesn't have an
.absolute() method. The path is already absolute, so we can use it
directly without calling .absolute().

This fixes the AttributeError: 'path' object has no attribute 'absolute'
error that was causing all 110 tests to fail on Sphinx 6.

The version check ensures Sphinx 7.2+ continues to use pathlib.Path
with .absolute() as before.

Author: mmcky

tests/conftest.py

@@ -15,7 +15,8 @@
     def rootdir(tmpdir):
         from sphinx.testing.path import path
 
-        src = path(__file__).parent.absolute() / "books"
+        # In Sphinx 6, path objects don't have .absolute() method, but they are already absolute
+        src = path(__file__).parent / "books"
         dst = tmpdir.join("books")
         shutil.copytree(src, dst)
         yield path(dst)