Wrap lines that go beyond GitHub Editor (#1925)

* Wrap lines that go beyond GiHub Editor

* flake8 --count --select=E501 --max-line-length=127

* updating DIRECTORY.md

* Update strassen_matrix_multiplication.py

* fixup! Format Python code with psf/black push

* Update decision_tree.py

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

machine_learning/logistic_regression.py

@@ -1,6 +1,6 @@
 #!/usr/bin/python
 
-## Logistic Regression from scratch
+# Logistic Regression from scratch
 
 # In[62]:
 
@@ -8,8 +8,12 @@
 
 # importing all the required libraries
 
-""" Implementing logistic regression for classification problem
-     Helpful resources : 1.Coursera ML course    2.https://medium.com/@martinpella/logistic-regression-from-scratch-in-python-124c5636b8ac"""
+"""
+Implementing logistic regression for classification problem
+Helpful resources:
+Coursera ML course
+https://medium.com/@martinpella/logistic-regression-from-scratch-in-python-124c5636b8ac
+"""
 
 import numpy as np
 import matplotlib.pyplot as plt
@@ -21,7 +25,8 @@ from sklearn import datasets
 
 # In[67]:
 
-# sigmoid function or logistic function is used as a hypothesis function in classification problems
+# sigmoid function or logistic function is used as a hypothesis function in
+# classification problems
 
 
 def sigmoid_function(z):