Single line enum should not be wrapped

[paul-dingemans]

Given enum below:

enum class RuleMethod { BEFORE_FIRST, BEFORE_CHILDREN, VISIT, AFTER_CHILDREN, AFTER_LAST }

This enum is formatted by the statement-wrapping rule as follows:

    enum class RuleMethod {
        BEFORE_FIRST,
        BEFORE_CHILDREN,
        VISIT,
        AFTER_CHILDREN,
        AFTER_LAST,
    }

A single line enum should however not be changed by this rule.

Note: this problem can not be reproduced in ktlint CLI version 0.50 due to #2170.