--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mercurial/cext/mpatch.pyi	Sat Nov 07 16:28:30 2020 -0800
@@ -0,0 +1,10 @@
+from typing import (
+    List,
+)
+
+version: int
+
+class mpatchError(Exception): ...
+
+def patches(text: bytes, bins: List[bytes]) -> bytes: ...
+def patchedsize(orig: int, data: bytes) -> int: ...