Formatting

Author: darrenburns

src/textual/app.py

@@ -2944,9 +2944,9 @@ def panic(self, *renderables: RenderableType) -> None:
         Args:
             *renderables: Text or Rich renderable(s) to display on exit.
         """
-        assert all(is_renderable(renderable) for renderable in renderables), (
-            "Can only call panic with strings or Rich renderables"
-        )
+        assert all(
+            is_renderable(renderable) for renderable in renderables
+        ), "Can only call panic with strings or Rich renderables"
 
         def render(renderable: RenderableType) -> list[Segment]:
             """Render a panic renderables."""