diff --git a/src/textual/app.py b/src/textual/app.py
index b8aab009b4..3e7b99fcb8 100644
--- a/src/textual/app.py
+++ b/src/textual/app.py
@@ -1253,7 +1253,7 @@ def _watch_theme(self, theme_name: str) -> None:
     def _invalidate_css(self) -> None:
         """Invalidate CSS, so it will be refreshed."""
         self._css_update_count += 1
-        
+
     def watch_ansi_theme_dark(self, theme: TerminalTheme) -> None:
         if self.current_theme.dark:
             self._refresh_truecolor_filter(theme)
diff --git a/src/textual/command.py b/src/textual/command.py
index 403cb98926..6f02e11bc2 100644
--- a/src/textual/command.py
+++ b/src/textual/command.py
@@ -342,7 +342,9 @@ class SimpleCommand(NamedTuple):
     """The description of the command."""
 
 
-CommandListItem: TypeAlias = "SimpleCommand | tuple[str, IgnoreReturnCallbackType, str | None] | tuple[str, IgnoreReturnCallbackType]"
+CommandListItem: TypeAlias = (
+    "SimpleCommand | tuple[str, IgnoreReturnCallbackType, str | None] | tuple[str, IgnoreReturnCallbackType]"
+)
 
 
 class SimpleProvider(Provider):