Comment on the last line is moved on the line above

[gixlg]

Considering this yml input

environment:
  ### SESSION START ###
  A: "true"
  B: "true"
  ### SESSION END ###

if the document is parsed and then printed out the result is not the same, but the comment goes on the same line as 'B'.

const file = fs.readFileSync('./test/input/config.yml', 'utf8')
const doc = YAML.parseDocument(file)
doc.toString()

output

environment:
  ### SESSION START ###
  A: "true"
  B: "true" ### SESSION END ###

Expected behaviour
I would like to preserve the positioning of the comment. There is a way to achieve it?

Versions:

• Environment:
• Node.js: v12.14.0
• yaml: 2.0.0-5

[eemeli]

Are you sure that this is happening with the example that you posted above? I'm not able to replicate this behaviour:

const doc = YAML.parseDocument(`environment:
  ### SESSION START ###
  A: "true"
  B: "true"
  ### SESSION END ###
`)

doc.toString()
> 'environment:\n' +
  '  ### SESSION START ###\n' +
  '  A: "true"\n' +
  '  B: "true"\n' +
  '  ### SESSION END ###\n'

I don't doubt that end-comment placement is problematic, so this may well be a dupe of #244.

[gixlg]

Oh yeah, my bad I haven't reported an important detail apparently: The empty line at the end of the input.

const doc = YAML.parseDocument(`environment:
  ### SESSION START ###
  A: "true"
  B: "true"
  ### SESSION END ###

`);

doc.toString()
> 'environment:\n' +
  '  ### SESSION START ###\n' +
  '  A: "true"\n' +
  '  B: "true" ### SESSION END ###\n'

Here the project to reproduce it: https://stackblitz.com/edit/test-yml

This use case is useful for me when there are ymls more complex and space and line comment can be used to gain more clarity.

environment:
  ### SESSION START ###
  A: "true"
  B: "true"
  ### SESSION END ###

  ### ANOTHER SESSION START ###
  C: "true"
  D: "true"
  ### ANOTHER SESSION END ###
  

like this example above.