Why does it print in the next line instead of continuing in the same line after coma?

Question

def do_two(f):
f()
f()

def do_four(f):
do_two (f)
do_two (f)
def print_beam():
print ('+ - - -',)
def print_post():
print ('| ',)
def print_beams():
do_two(print_beam)
print('+')
def print_posts():
do_two(print_post)
print('|')
def print_row():
print_beams()
do_four(print_posts)
def print_grid():
do_two(print_row)
print_beams()
print_grid()

Answer 1

use print(' your str hear', end='')

Answer 2

becausw print works like this by default

Answer 3

so what about this statement from the book:"If the sequence ends with a comma, Python leaves the line unfinished, so the value printed next appears on the same line."