--- a/mercurial/mail.py Tue Nov 19 23:19:57 2019 +0900
+++ b/mercurial/mail.py Tue Nov 19 23:49:05 2019 +0900
@@ -36,7 +36,7 @@
stringutil,
)
-if not globals(): # hide this from non-pytype users
+if pycompat.TYPE_CHECKING:
from typing import Any, List, Tuple, Union
# keep pyflakes happy