inconsistency of `toFormat` result with negative zero

[Elinia]

toFormat provides different results with negative zero, is it an expected behavior?

console.log(new BigNumber("-0.1").toFormat(0)); // '-0'
console.log(new BigNumber("-0").toFormat(0)); // '0'

I found this issue when trying to support negative decimal places with something like:

function formatNumber(value, decimalPlaces, roundingMode, format) {
  var multiplier = new BigNumber(10).pow(decimalPlaces)
  return new BigNumber(value)
    .times(multiplier)
    .dp(0, roundingMode)
    .div(multiplier)
    .toFormat(Math.max(decimalPlaces, 0), roundingMode, format)
}

[MikeMcl]

Yes, it intentionally matches the behaviour of toFixed with primitive numbers:

console.log( (-0.1).toFixed(0) );    // '-0'
console.log( (-0).toFixed(0) );      // '0'

I'll consider supporting negative decimal places here.

[Elinia]

Thanks for the kindly reply!