* Audit atomic block labels
* Add summary, descrtiption, and short description to API and use for summary block
* Add summary to cart item api
* Respect short description
* Tweak label of summary block
* Revert product rating label
* One description vs 3
* Update sample content with more appropriate values, and match in cart items sample
* Move summary generation to class
* Tests
* Prevent extending `ProductSummary`
* Tweak $paragraph handling
* More accurate word counting
* add tear down for filter
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