Describe the bug

Do parsing the text then format it.

  let doc = YAML.parseDocument(text);
  console.log(YAML.stringify(doc));

To Reproduce

input text:

a:   1
#a: 1
# b: 2

got result:

a: 1

Expected behaviour

a: 1
#a: 1
# b: 2

Versions (please complete the following information):

• Environment: Node.js v22.6.0
• yaml: 2.5.1

Additional context

None