2 id невалидно

dabblet.css

/*Селекторы. Class, ID*/

body
{
	font-size: 32px
}

#myid
{
	color: red;
}

.myclass
{
	color: #333 /* применился ко всем */
}

#myid2.myclass
{
	font-weight: bold;
}

.myclass.mysuperclass
{
	text-decoration: underline;
}

#myid3.myclass.mysuperclass
{
	font-style: italic;
}

/* 2 id невалидно */
#myid4#mysupperid
{
	background: yellow;
}

dabblet.html

<div id="myid">текст</div>
<div class="myclass">текст</div>
<div id="myid2" class="myclass">текст</div>
<div id="myid3" class="myclass mysuperclass">текст</div>
<div id="myid4 mysupperid" class="myclass mysuperclass">текст</div>

settings.json

{"view":"split","fontsize":"100","seethrough":"","prefixfree":"1","page":"all"}