update comment

plugin/multiplex/master.js

 (function() {
-	// don't emit events from inside the previews themselves
+	// Don't emit events from inside of notes windows
 	if ( window.location.search.match( /receiver/gi ) ) { return; }
+
 	var multiplex = Reveal.getConfig().multiplex;
 
 	var socket = io.connect(multiplex.url);