diff --git a/metrics/confusion_matrix/confusion_matrix.py b/metrics/confusion_matrix/confusion_matrix.py
index b118e067..5ea33038 100644
--- a/metrics/confusion_matrix/confusion_matrix.py
+++ b/metrics/confusion_matrix/confusion_matrix.py
@@ -39,7 +39,7 @@
     Example 1-A simple example
         >>> confusion_matrix_metric = evaluate.load("confusion_matrix")
         >>> results = confusion_matrix_metric.compute(references=[0, 1, 2, 0, 1, 2], predictions=[0, 1, 1, 2, 1, 0])
-        >>> print(results)  # doctest: +ELLIPSIS +NORMALIZE_WHITESPACE 
+        >>> print(results)  # doctest: +ELLIPSIS +NORMALIZE_WHITESPACE
         {'confusion_matrix': array([[1, 0, 1], [0, 2, 0], [1, 1, 0]][...])}
 """