Why does CMD display bugs in place of Python 3 function declaration?

Question

Python

When executing the following when:
def test():
'''Your advertisement could have been here'''
print('Your advertisement could have been here')
# Look at the description of the
help(test)
function # Calling the
test()
CMD function displays the following:

Answer 1

The file encoding is not digested by the console.
The easiest way is to write comments in English.