[castillar76]

As someone who's spent the last several years maintaining a couple large, vaguely complex documents (CP-CPS documents for certificate authorities), AsciiDoc has been a winner. It's simple enough to be readable in git diffs and be updated by non-tech folks like managers, but supports enough features that doing things like tables, nested lists, and certificate structure notation to be workable. And it's WAY more manageable using git to build and publish to PDFs (using Pandoc) than trying to use Word docs.