fails:Integer#lcm returns self if equal to the argument
fails:Integer#lcm returns an Integer
fails:Integer#lcm returns the least common multiple of self and argument
fails:Integer#lcm returns a positive integer even if self is negative
fails:Integer#lcm returns a positive integer even if the argument is negative
fails:Integer#lcm returns a positive integer even if both self and argument are negative
fails:Integer#lcm accepts a Bignum argument
fails:Integer#lcm works if self is a Bignum
fails:Integer#lcm raises an ArgumentError if not given an argument
fails:Integer#lcm raises an ArgumentError if given more than one argument
fails:Integer#lcm raises a TypeError unless the argument is an Integer
