Function splitFirstTopLevel

Rewrite-Parser.beta.js:2082–2085

(str, sep)

}

function splitFirstTopLevel(str, sep) {
  const parts = splitTopLevel(str, sep)
  return [parts[0] || '', parts.slice(1).join(sep).trim()]
}

function quoteIfNeeded(str) {
  str = `${str ?? ''}`.trim()