[docs] updatation is needed

in documentation page of python 3.0 and current documentation of python tutorial there is missing break statement in break and continue statements example. for n in range(2, 10): ... for x in range(2, n): ... if n % x == 0: ... print(n, 'equals', x, '*', n//x) ... break ... else: ... # loop fell through without finding a factor ... print(n, 'is a prime number') here extra break statement is required at the end of else loop.