Button custom attributes not retained

[nikjft]

I am building templates for Pardot, which requires the certain attributes (e.g. "pardot-repeatable," and "pardot-editable") to be added to all editable elements.

For most tags in Inky, I can do this fine. Adding pardot-repeatable to a Container or Row ensures that the generated outer table maintains that attribute.

However, on buttons, if I have , the special tag doesn't make it through.

I would expect that tag to be added either to the containing table or (ideally) on the a href that represents the button. Regardless, it should not be deleted.

[ianberdin]

"devDependencies": {
  "inky": "git+https://github.com/zurb/inky.git#234542170bc41a987208aab1dd0c2c18d0a29f75",
}