[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

machine_learning/gradient_descent.py

@@ -60,7 +60,6 @@ def output(example_no: int, data_set: str) -> float:
     raise ValueError(msg)
 
 
-
 def calculate_hypothesis_value(example_no: int, data_set: str) -> float:
     """
     Calculates hypothesis value for a given example
@@ -76,7 +75,6 @@ def calculate_hypothesis_value(example_no: int, data_set: str) -> float:
     raise ValueError(msg)
 
 
-
 def summation_of_cost_derivative(index: int, end: int = m) -> float:
     """
     Calculates the sum of cost function derivative