SyntaxSuggest::PriorityQueue#bubble_down

# File tmp/rubies/ruby-3.2.0/lib/syntax_suggest/priority_queue.rb, line 81
        def bubble_down(index)
  child_index = (index * 2) + 1

  return if child_index > last_index

  not_the_last_element = child_index < last_index
  left_element = @elements[child_index]
  right_element = @elements[child_index + 1]

  child_index += 1 if not_the_last_element && (right_element <=> left_element) == 1

  return if (@elements[index] <=> @elements[child_index]) >= 0

  exchange(index, child_index)
  bubble_down(child_index)
end