docs: function isSpace(c)
  {
  	return (c === 0x20) ||
  	    (c >= 0x0009 && c <= 0x000d) ||
  	    (c === 0x00a0) ||
  	    (c === 0x1680) ||
  	    (c === 0x180e) ||
  	    (c >= 0x2000 && c <= 0x200a) ||
  	    (c === 0x2028) ||
  	    (c === 0x2029) ||
  	    (c === 0x202f) ||
  	    (c === 0x205f) ||
  	    (c === 0x3000) ||
  	    (c === 0xfeff);
  }