Hotfix for user-defined arrays to be handled correctly by autoformatter

[metthal]

It's still not ideal because for example for rule

	condition:
		1 of [
			cuckoo.sync.mutex(/a/),
			cuckoo.sync.mutex(/b/)
		]

is formatted into

	condition:
		1 of [
		cuckoo.sync.mutex(/a/),
		cuckoo.sync.mutex(/b/)
		]
}

but at least it no longer crashes. Once it's merged please release 3.9.2 as a hotfix release.

[TadeasKucera]

Thank you very much for such fast hotfix!