Fix format_cell arguments

Worked locally, but not from google colab ...

lab_black.py

@@ -201,7 +201,7 @@ def __set_cell(self, unformatted_cell, cell, cell_id=None):
             )
             display(Javascript(js_code))
 
-    def format_cell(self, result):
+    def format_cell(self, *args, **kwargs):
         try:
             cell_id = len(self.shell.user_ns["In"]) - 1
             if cell_id > 0: