Events / Component events syntax highlighting missing

[erickdcohen]

One of the items the user is supposed to add was not highlighted like the rest.

This was under Events/ Component events

apps/svelte.dev/content/tutorial/01-svelte/05-events/04-component-events/index.md

I believe the user is supposed to add increment, decrement but only increment is highlighted. I see in the file there are three plus signs +++, not sure why the rendering is wrong.