fix(ci): Update pre-commit hooks and apply new black (#4359)

* fix(ci): Update pre-commit hooks and apply new black

* remove empty docstring

machine_learning/linear_discriminant_analysis.py

@@ -283,7 +283,7 @@ def valid_input(
 
 # Main Function
 def main():
-    """ This function starts execution phase """
+    """This function starts execution phase"""
     while True:
         print(" Linear Discriminant Analysis ".center(50, "*"))
         print("*" * 50, "\n")

machine_learning/linear_regression.py

@@ -88,7 +88,7 @@ def run_linear_regression(data_x, data_y):
 
 
 def main():
-    """ Driver function """
+    """Driver function"""
     data = collect_dataset()
 
     len_data = data.shape[0]