testBit is:exact

x `testBit` i is the same as x .&. bit n /= 0 In other words it returns True if the bit at offset @n is set. Can be implemented using testBitDefault if a is also an instance of Num.
x `testBit` i is the same as x .&. bit n /= 0 In other words it returns True if the bit at offset @n is set. Can be implemented using testBitDefault if a is also an instance of Num.
Return Just if every bitvector in the domain has the same bit at the given index.