DBC Prework - Pad an array. In the second method, removing "clone" from line 17 causes the code to fail the 4th spec test, for padding the array with "apples". Why? It seems like all that should do is cause it to fail the 3rd spec test, for a non-destructive method.

pad_array

class Array
  
  def pad!(min_size, value = nil)
    array = self
    diff = min_size - self.length
    if diff <= 0
      return self
    else
      diff.times do 
       array.push(value)
      end
      return array
    end
  end
  
  def pad(min_size, value = nil)
    array = self.clone
    array.pad!(min_size, value)
    return array
  end
  
end