update readme for new markdown parser

README.md

@@ -12,6 +12,7 @@ costco is a [couchapp](http://couchapp.org), you can push it to any db:
 costco takes a map function and executes it on all the docs in the database. The map function should return the new doc that you'd like to replace the old one, or `null` if it should be deleted. Returning `undefined` does nothing to that doc.
 
 An example map function that increments a field in all the docs and deletes some docs based on another field:
+
 	function(doc) {
 	  if(doc.text.length > 200)
 	    return null;