Create u2-10.prob_with_coverage.py

# CORRECT SPECIFICATION:
#
# isPrime checks if a positive integer is prime.
#
# A positive integer is prime if it is greater than 
# 1, and its only divisors are 1 and itself.
#
# TASKS:
#
# 1) Add an assertion to test() that shows
#    isPrime(number) to be incorrect for 
#    some input.
#
# 2) Write isPrime2(number) to correctly 
#    check if a positive integer is prime.