diff --git a/ignite/metrics/regression/pearson_correlation.py b/ignite/metrics/regression/pearson_correlation.py
index 16058b48584..f91da83e8b6 100644
--- a/ignite/metrics/regression/pearson_correlation.py
+++ b/ignite/metrics/regression/pearson_correlation.py
@@ -9,7 +9,7 @@
 
 
 class PearsonCorrelation(_BaseRegression):
-    r"""Calculates the 
+    r"""Calculates the
     `Pearson correlation coefficient <https://en.wikipedia.org/wiki/Pearson_correlation_coefficient>`_.
 
     .. math::