~~ arrowFunctionExpression.preferHangingParameters: false, lineWidth: 40 ~~
== should force multi-line parameters when exceeding the line width ==
const t = (testing, thisOut, byExceeding, theLineWidth) => "";

[expect]
const t = (
    testing,
    thisOut,
    byExceeding,
    theLineWidth
) => "";

== should not be multi-line when not exceeding the line width ==
const t = (testing, thisOut) => "";

[expect]
const t = (testing, thisOut) => "";
