input: Write a function to create a contour plot of the function \( f(x, y) = x + y \) using matplotlib and numpy.
  assert create_contour_plot(np.arange(-4.0, 4.0, 0.1), np.arange(-4.0, 4.0, 0.1)) is None
output: def create_contour_plot(x_range, y_range):
      import matplotlib.pyplot as plt
      import numpy as np
  
      X, Y = np.meshgrid(x_range, y_range)
      Z = X + Y
  
      plt.contour(X, Y, Z)
      plt.title('Contour plot of f(x, y) = x + y')
      plt.xlabel('x')
      plt.ylabel('y')
      plt.show()