bpo-37412: Fix test_os.test_getcwd_long_path() on macOS (GH-14452)

(cherry picked from commit 29f609e)

Co-authored-by: Victor Stinner <[email protected]>

Author: miss-islington

Lib/test/test_os.py

@@ -106,8 +106,7 @@ def test_getcwd_long_path(self):
         dirname = dirname + ('a' * (dirlen - len(dirname)))
 
         with tempfile.TemporaryDirectory() as tmpdir:
-            with support.change_cwd(tmpdir):
-                path = tmpdir
+            with support.change_cwd(tmpdir) as path:
                 expected = path
 
                 while True: