Is your feature request related to a problem? Please describe.

I'm worried that the format function is brittle.

Describe the solution you'd like

It should always return html. And never fail. I could use some help writing more tests for this function (that is run on every repr and str call).

There's a warning note in README.md detailing:

Warning - the AnalyzeDocument process from AWS Textract costs $50 per 1,000 PDF pages. Be careful when deploying this CDK stack as you could unintentionally rack up an expensive AWS bill quickly if you're not paying attention.

This might not be enough - if a user finds this project and doesn't read the documentation, they could inadvertently