Update simple_moving_average.py

Changes have been applied.

Author: incheonQ

financial/simple_moving_average.py

@@ -35,10 +35,8 @@ def simple_moving_average(
         raise ValueError("Window size must be a positive integer")
 
     if window_size > len(data):
-        raise ValueError(
-            "Window size must be smaller than the total length of the time series"
-        )
-
+        raise ValueError("Window size must be smaller than the total length of the time series")
+        
     sma: list[float | None] = []
 
     for i in range(len(data)):