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-rw-r--r--sphinx/util/inspect.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/sphinx/util/inspect.py b/sphinx/util/inspect.py
index 3d89a4f6e..6a0f5f2b0 100644
--- a/sphinx/util/inspect.py
+++ b/sphinx/util/inspect.py
@@ -106,7 +106,7 @@ def getmro(obj: Any) -> Tuple[Type, ...]:
if isinstance(__mro__, tuple):
return __mro__
else:
- return tuple()
+ return ()
def getorigbases(obj: Any) -> Optional[Tuple[Any, ...]]: