Arbital page summaries Markdown syntax

You can set the page’s sum­mary, which shows up in popovers and other places. For ex­am­ple:
Sum­mary of the page goes here. *Mark­down* is okay!
Or to set a spe­cific sum­mary:
Very tech­ni­cal sum­mary. *Mark­down* is okay!
Make sure that the en­tire sum­mary block is in a para­graph of its own.