* change doctest line
import doctest is not relevant with algorithms. move it under main section.
* from doctest import testmod
* refactor: move doctest under "main" section
* Update diophantine_equation.py
* Update modular_division.py
Co-authored-by: Christian Clauss <cclauss@me.com>
* change doctest line
import doctest is not relevant with algorithms. move it under main section.
* from doctest import testmod
Co-authored-by: Christian Clauss <cclauss@me.com>