Unquote `"double\nquote"` get's messy

[o-l-a-v]

Describe the bug

Unquoting where a double quoted string contains newline gets messy.

• This could be intended behavior for all I know, but I'd expect a clean unquote or keep single or double quotes where neccessary, ref: https://yamlscript.org/blog/2025-07-20/yaml-best-practices/.

Version 4.53.3.

Input Yaml

---
# Ref: https://yamlscript.org/blog/2025-07-20/yaml-best-practices/
test:
  should-be-unquoted:
    - "doubles quote, should be no quotes"
    - 'single quote, should be no quotes'
  should-be-changed-to-single-quote:
    - "{double quote, should be single quote}"
  should-remain-double-quote:
    - "double\nquote, should remain"
  keys-should-also-be-fixed:
    'single qote, should be no quotes': true
    "{double quote, should be single quote}": 1
    "double\nquote, should remain": true

Command

yq -i '... style=""' ".\yaml string quoting test.yml"

Actual behaviour

---
# Ref: https://yamlscript.org/blog/2025-07-20/yaml-best-practices/
test:
  should-be-unquoted:
    - doubles quote, should be no quotes
    - single quote, should be no quotes
  should-be-changed-to-single-quote:
    - '{double quote, should be single quote}'
  should-remain-double-quote:
    - |-
      double
      quote, should remain
  keys-should-also-be-fixed:
    single qote, should be no quotes: true
    '{double quote, should be single quote}': 1
    ? |-
      double
      quote, should remain
    : true

Expected behaviour

---
# Ref: https://yamlscript.org/blog/2025-07-20/yaml-best-practices/
test:
  should-be-unquoted:
    - doubles quote, should be no quotes
    - single quote, should be no quotes
  should-be-changed-to-single-quote:
    - '{double quote, should be single quote}'
  should-remain-double-quote:
    - "double\nquote, should remain"
  keys-should-also-be-fixed:
    single qote, should be no quotes: true
    '{double quote, should be single quote}': 1
    "double\nquote, should remain": true

Additional context

None.

[vigneshakaviki]

Claiming this. Fixing style="" so multiline double-quoted strings stay double quoted instead of turning into block scalars.