https://github.com/fletcher/MultiMarkdown/wiki/MultiMarkdown-Syntax-Guide

Note under the Tables section that the rendered table should be in is displaying unconverted markup code:

into a [table][Prototype Table].

| | Grouping || First Header | Second Header | Third Header | | ---------- | :-----------: | -----------: | Content | Long Cell || Content | Cell | Cell |

New section | More | Data | And more | And more || [Prototype table]