[pre-commit.ci] pre-commit autoupdate (#270)

* [pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/psf/black: 23.7.0 → 23.9.1](https://github.com/psf/black/compare/23.7.0...23.9.1)
- [github.com/astral-sh/ruff-pre-commit: v0.0.287 → v0.0.288](https://github.com/astral-sh/ruff-pre-commit/compare/v0.0.287...v0.0.288)

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

docs/source/reference/examples.md

@@ -132,22 +132,22 @@ directly write the `construct` method in the body of `MovingCameraSlide`.
 
     from manim import *
     from manim_slides import Slide
-    
-    
+
+
     class MovingCameraSlide(Slide, MovingCameraScene):
         pass
-    
+
     class SubclassExample(MovingCameraSlide):
         def construct(self):
             self.camera.frame.save_state()
-    
+
             ax = Axes(x_range=[-1, 10], y_range=[-1, 10])
             graph = ax.plot(lambda x: np.sin(x), color=WHITE, x_range=[0, 3 * PI])
-    
+
             dot_1 = Dot(ax.i2gp(graph.t_min, graph))
             dot_2 = Dot(ax.i2gp(graph.t_max, graph))
             self.add(ax, graph, dot_1, dot_2)
-    
+
             self.play(self.camera.frame.animate.scale(0.5).move_to(dot_1))
             self.next_slide()
             self.play(self.camera.frame.animate.move_to(dot_2))