diff --git a/matrix/matrix_based_game.py b/matrix/matrix_based_game.py
index 1ff0cbe93435..a9eb525595ac 100644
--- a/matrix/matrix_based_game.py
+++ b/matrix/matrix_based_game.py
@@ -125,6 +125,7 @@ def parse_moves(input_str: str) -> list[tuple[int, int]]:
     return moves
 
 
+# this is a comment.
 def find_repeat(
     matrix_g: list[list[str]], row: int, column: int, size: int
 ) -> set[tuple[int, int]]: