Markdown interacts badly with dynasnips using underscores

Essentially, if a paragraph occurs like this:

Here's a {link_to a-snip} and a {link_to another-snip}.

then markdown will see the underscores and make the central portial italic. That's no good.

The default render order is

1. pass the text through the special render stuff (i.e. Markdown)

2. process any references to snips

... but it seems like this should be the other way round. In this case. Or Markdown should be taught to ignore things in curly braces.

As I recall, we can't flip the order because then markdown ends up processing content badly.