Migrating cart spec guide topics

The difference I see is the way the output is rendered, unless that depends on the CSS design aspect. When you don't use the double-containment, the callout title renders like so:

snapshot_exclusions Entry

Whereas if you use the double containment, it's automatically numbered and it renders like so:

Example 1.snapshot_exclusions Entry

And then the next one would be Example 2, and so on. But again, that could be CSS?