operator_usage_whitespace rule false positive for unwrapping of the optional optional

• Updated SwiftLint to the latest version (0.31.0)
• I searched for existing GitHub issues

SwiftLint thinks that ?? is a nil coalescing operator, while it's a unwrapping of the optional optional.

func success(for item: Item) {
    item.successHandler??() // <- triggers operator_usage_whitespace, bc there's no spaces around ??, but item.successHandler is an optional optional
}

Would be nice to make operator_usage_whitespace rule configurable so you can exclude specific operators (??). #1013

[emmavray]

@madyanov it may be helpful to see some context (particularly the definition of item.successHandler), could you post that?

[stale]

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[marcelofabri]

Fixed in #3962