Adjust style to match standards

src/prompt_toolkit/filters/app.py

@@ -187,6 +187,7 @@ def get_buffer_from_content(content: UIControl) -> bool:
             return content.buffer.validation_error is not None
         else:
             return False
+
     # Get all windows for the current layout
     windows = get_app().layout.find_all_windows()
     # Iterate over each window in the layout and return true if any of the buffers have validation errors

src/prompt_toolkit/widgets/toolbars.py

@@ -342,7 +342,9 @@ def __pt_container__(self) -> Container:
 
 
 class ValidationToolbar:
-    def __init__(self, show_position: bool = False, buffer: Buffer | None = None) -> None:
+    def __init__(
+        self, show_position: bool = False, buffer: Buffer | None = None
+    ) -> None:
         def get_formatted_text() -> StyleAndTextTuples:
             # If buffer not specified, use the currently focused buffer
             if buffer is None: