input: Write a python function to generate a list of numbers divisible by 7 up to a given limit.
  assert generate_divisible_by_7(50) == [0, 7, 14, 21, 28, 35, 42, 49]
  assert generate_divisible_by_7(100) == [0, 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98]
  assert generate_divisible_by_7(0) == [0]
output: def generate_divisible_by_7(limit):
      return [i for i in range(0, limit + 1) if i % 7 == 0]