Pinned callout blocks lose data.

[rafegoldberg]

Asana

In certain scenarios when a callout is pinned to the sidebar, like so...

...it seems to loose it's content on render:

This is likely to do with the way I've set up the callout AST, which requires some hoop-thru-jumping to parse out the icon and title text from the rest of the children content:

https://github.com/readmeio/api-explorer/blob/2cfc9160a46293b07574d49c2a255f783afd1a90/packages/markdown/components/Callout/index.jsx#L18

[kellyjosephprice]

I'm closing this as I believe it is now fixed!