Missing string in Grid api events sample

[EmilTanev]

Go here
https://igniteui.github.io/help-samples/16.2/EN/grid/grid-api-events/index.html

$$(API_Viewer)
https://www.screencast.com/t/gXvGpKlIpyk

[EmilTanev]

Happens in sample here as well
http://jp.staging.igniteui.local/help/iggrid-configuring-knockout-support?v=16.2#demo