docs: function makeFuncArgTree (pt, args, makeSymbolName, forceBraces, allowNakedSymbol) {
    var noBraces = !forceBraces && args.length === 1 && (args[0].type === 'func' || args[0].type === 'lookup' || args[0].type === 'alt' || (allowNakedSymbol && isPlainSymExpr(args[0])))
    return [noBraces ? '' : leftBraceChar, pt.makeRhsTree (args, makeSymbolName), noBraces ? '' : rightBraceChar]
  }