test-repo/changelog_unreleased/flow/pr-9432.md

Enums with unknown members (#9432 by @gkz)

Previously, was not supported. Now, the following is formatted:

// Input
enum E {
  A,
  B,
  ...
}

// Prettier stable: parse error

// Prettier master
enum E {
  A,
  B,
  ...
}