The formatter doesn't split policy scope into multiple lines when there are `is` operations

[shaobo-he-aws]

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Bug Category

Other

Describe the bug

Consider this policy from TinyTodo,

permit (principal, action, resource is List)
when { resource.owner == principal };

The formatter doesn't do anything with it, which should format it into,

permit (
  principal,
  action,
  resource is List
)
when { resource.owner == principal };

Expected behavior

See above.

Reproduction steps

cargo run format <<< 'permit (principal, action, resource is List)
when { resource.owner == principal };'

Code Snippet

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Log output

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Additional configuration

No response

Operating System

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Additional information and screenshots

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