Add TransformMatching code review changes

manim/animation/transform_matching_parts.py

@@ -122,6 +122,7 @@ class TransformMatchingAbstractBase(AnimationGroup):
             fade_source.add(source_map[key])
         for key in set(target_map).difference(source_map):
             fade_target.add(target_map[key])
+        fade_target_copy = fade_target.copy()
 
         if transform_mismatches:
             if "replace_mobject_with_target_in_scene" not in kwargs:
@@ -132,12 +133,12 @@ class TransformMatchingAbstractBase(AnimationGroup):
         else:
             anims.append(FadeOut(fade_source, target_position=fade_target, **kwargs))
             anims.append(
-                FadeIn(fade_target, target_position=fade_target, **kwargs),
+                FadeIn(fade_target_copy, target_position=fade_target, **kwargs),
             )
 
         super().__init__(*anims)
 
-        self.to_remove = mobject
+        self.to_remove = [mobject, fade_target_copy]
         self.to_add = target_mobject
 
     def get_shape_map(self, mobject: Mobject) -> dict:
@@ -155,11 +156,9 @@ class TransformMatchingAbstractBase(AnimationGroup):
     def clean_up_from_scene(self, scene: Scene) -> None:
         # Interpolate all animations back to 0 to ensure source mobjects remain unchanged.
         for anim in self.animations:
-            # Skip interpolating FadeIn because fade_target is not a source.
-            if not isinstance(anim, FadeIn):
-                anim.interpolate(0)
+            anim.interpolate(0)
         scene.remove(self.mobject)
-        scene.remove(self.to_remove)
+        scene.remove(*self.to_remove)
         scene.add(self.to_add)
 
     @staticmethod