Maximum line length exceeded (see RFC 5322 2.1.1)

[siccovansas]

How can we reproduce this bug?
Create an email template with at least 1000 characters using the Sass version of Foundation for Emails. The resulting .html file in the dist folder will now contain only 1 line with more than 1000 characters. This violates RFC 5322 2.1.1. Some email providers accept emails with more than 1000 characters (e.g. Gmail), but others don't and reject the email (e.g. YourHosting).

What did you expect to happen?
Emails generated by the Sass version of Foundation for Emails should conform to RFC 5322 so there are no deliverability issues.

Suggested fix
One way to fix this is to edit gulpfile.babel.js and change collapseWhitespace from true to false. A more robust fix is needed though as this change won't guarantee a line length of at most 1000 characters.