docs: public static String toStringLow(long v) {
      final int mag = magnitude(v);
      if(mag == 0) {
        return "0";
      }
      char[] digits = new char[mag];
  
      long f = 1L;
      for(int pos = 0; pos < mag; ++pos, f <<= 1) {
        digits[pos] = ((v & f) == 0) ? '0' : '1';
      }
      return new String(digits);
    }