A new shade of Black (#11362)

stdlib/msilib/__init__.pyi

@@ -56,6 +56,7 @@ if sys.platform == "win32":
         def gen_id(self, file: str) -> str: ...
         def append(self, full: str, file: str, logical: str) -> tuple[int, str]: ...
         def commit(self, db: _Database) -> None: ...
+
     _directories: set[str]
 
     class Directory: