DOC: Refactor low_pass_filter docstring to pass sphinx

rocketpy/mathutils/function.py

@@ -1087,21 +1087,20 @@ def to_frequency_domain(self, lower, upper, sampling_frequency, remove_dc=True):
         )
 
     def low_pass_filter(self, alpha):
-        """
-        Implements a low pass filter with a moving average filter
+        """Implements a low pass filter with a moving average filter
 
-        Parameters:
+        Parameters
         ----------
-        - alpha : float
-            Attenuation coefficient, 0 < alpha < 1
+        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
             (but with a phase shift)
 
-        Returns:
-        ----------
-        - filtered_function : Function
+        Returns
+        -------
+        Function
             The function with the incoming source filtered
         """
         filtered_signal = np.zeros_like(self.source)