diff --git a/rocketpy/mathutils/function.py b/rocketpy/mathutils/function.py
index 2a161e905..49b49ab35 100644
--- a/rocketpy/mathutils/function.py
+++ b/rocketpy/mathutils/function.py
@@ -1093,16 +1093,16 @@ def low_pass_filter(self, alpha):
 
         Parameters:
         ----------
-        - alpha : float 
+        - alpha : float
             Attenuation coefficient, 0 < alpha < 1
-            For a given dataset, the larger alpha is, the more closely the 
-            filtered function returned will match the function the smaller 
-            alpha is, the smoother the filtered function returned will be 
+            For a given dataset, the larger alpha is, the more closely the
+            filtered function returned will match the function the smaller
+            alpha is, the smoother the filtered function returned will be
             (but with a phase shift)
 
         Returns:
         ----------
-        - filtered_function : Function 
+        - filtered_function : Function
             The function with the incoming source filtered
         """
         filtered_signal = np.zeros_like(self.source)