fix: use a tree symlink 2 components up

Author: mayeut

Lib/test/test_venv.py

@@ -822,13 +822,16 @@ def test_tree_symlink(self):
         Test creation using a symlink to python tree.
         """
         rmtree(self.env_dir)
-        tree_abspath = os.path.dirname(os.path.abspath(sys.executable))
+        executable_abspath = os.path.abspath(sys.executable)
+        tree_abspath = os.path.dirname(
+            os.path.dirname(executable_abspath))
         with tempfile.TemporaryDirectory() as symlink_dir:
             tree_symlink = os.path.join(
                 os.path.realpath(symlink_dir),
                 os.path.basename(tree_abspath))
             executable_symlink = os.path.join(
                 tree_symlink,
+                os.path.basename(os.path.dirname(executable_abspath)),
                 os.path.basename(sys.executable))
             os.symlink(tree_abspath, tree_symlink)
             cmd = [executable_symlink, "-m", "venv", "--without-pip",