test-repo/changelog_unreleased/yaml/pr-9665.md

Apply trailingComma option (#9665 by @fisker)

When --trailing-comma=none, should not add trailing comma to flowMapping and flowSequence.

# Input
flow-mapping:
  {
    "object-does-not-fit-within-print-width": "------",
    "TEST": "comma IS added here"
  }
flow-sequence:
  [
    "object-does-not-fit-within-print-width", "------",
    "TEST", "comma IS added here"
  ]

# Prettier stable
mapping:
  {
    "object-does-not-fit-within-print-width": "------",
    "TEST": "comma IS added here",
  }
flow-sequence:
  [
    "object-does-not-fit-within-print-width",
    "------",
    "TEST",
    "comma IS added here",
  ]

# Prettier master
flow-mapping:
  {
    "object-does-not-fit-within-print-width": "------",
    "TEST": "comma IS added here"
  }
flow-sequence:
  [
    "object-does-not-fit-within-print-width",
    "------",
    "TEST",
    "comma IS added here"
  ]