style(pre-commit.ci): auto fixes [...]

Author: pre-commit-ci[bot]

src/ndv/viewer/_backends/_protocols.py

@@ -100,7 +100,7 @@ def set_range(
     def zoom(
         self,
         factor: Union[float, tuple],
-        center: tuple = None,
+        center: tuple | None = None,
     ) -> None: ...
     def refresh(self) -> None: ...
     def qwidget(self) -> QWidget: ...

src/ndv/viewer/_backends/_pygfx.py

@@ -561,7 +561,7 @@ def set_range(
         cam.zoom = 1 - margin
         self.refresh()
 
-    def zoom(self, factor: Union[float, tuple], center: tuple = None):
+    def zoom(self, factor: Union[float, tuple], center: tuple | None = None):
         """
         Zoom in (or out) at the given center.
 

src/ndv/viewer/_backends/_vispy.py

@@ -2,7 +2,7 @@
 
 import warnings
 from contextlib import suppress
-from typing import TYPE_CHECKING, Any, Literal, Union, cast
+from typing import TYPE_CHECKING, Any, Literal, cast
 from weakref import WeakKeyDictionary
 
 import cmap
@@ -580,7 +580,7 @@ def set_range(
             max_size = max(x[1], y[1], z[1])
             self._camera.scale_factor = max_size + 6
 
-    def zoom(self, factor: Union[float, tuple], center: tuple = None):
+    def zoom(self, factor: float | tuple, center: tuple | None = None):
         """
         Zoom in (or out) at the given center.