Ask HN: How do you maintain privacy policy/terms and conditions documents?

We're about to update a handful of website terms and conditions/privacy policies ahead of the GDPR enforcement deadline.

We have a number of different platforms and I've been trying to determine the best way of maintaining a master document that can easily be updated in multiple places (accepting some manual intervention).

From experience, I find that Finance/Legal are happiest editing on MS Word (slowly moving this to collaboration in Google Docs), but both of these solutions output kludgy/semi-formatted HTML. Every minor change can lead to extensive HTML reformatting.

More recently I'm using a Markdown file but this isn't friendly for the Legal side of the business, and it struggles with nested numbered-bullet points.

Does anyone have any success stories of making this work for all parties?!