Add format.html for text from fields of abstract records and the like

Add format.html for text from fields of abstract records and the like,
For example in MenuCardList.html
```

{page.data.subtitle-> f:format.html()}

{page.data.abstract-> f:format.html()}

```

Start with the MenuCardList.html example and inspect how subtitle and abstract fields are rendered. Apply the requested HTML formatting to text from abstract records and similar fields, then verify that the rendered card text uses the intended formatting and cropping.

Written by the indexing model from the issue text.