Appending requestBody to curl samples

[nada-one]

Hello! First of all, thanks for this awesome package! It's just so really helpful in producing excellent API documentation.

I just wanted to reach out to ask if there's a way I can append the form-data params to the curl examples. Right now, requestBody that are of multi-part form data and application/json content types show in the curl samples if httpsnippet and experimental options are hardcoded to true, but not params with x-www-form-urlencoded content-type. Any help is much appreciated.

Thank you in advance!

[nada-one]

Turns out to be an issue in widdershins package. Sent a PR for potential fix: Mermade/widdershins#492