fonts.ready is a property not a function

Author: jakearchibald

css-font-loading/Overview.bs

@@ -1041,7 +1041,7 @@ API Examples</h2>
 		To show content only after all font loads complete:
 
 		<pre>
-			document.fonts.ready().then(function() {
+			document.fonts.ready.then(function() {
 				var content = document.getElementById("content");
 				content.style.visibility = "visible";
 			});
@@ -1081,7 +1081,7 @@ API Examples</h2>
 
 			function doEditing() {
 				// content/layout operations that may cause additional font loads
-				document.fonts.ready().then(measureTextElements);
+				document.fonts.ready.then(measureTextElements);
 			}
 		</pre>
 	</div>