Correct table documentation in Remarkup reference
Summary: Ref T10570. Earlier work on that task made tables activate even if indented so they work in quoted blocks. However, the documentation doesn't explicitly mark them in code blocks, so it turned them into markup.
Used bin/diviner generate to regenerate documentation, verified it now renders properly.
Reviewed By: chad
Maniphest Tasks: T10570
Differential Revision: https://secure.phabricator.com/D15619