http://yaml.org/spec/1.2/spec.html#id2760844

Specifically, there is no way to output this:

>
 Sammy Sosa completed another
 fine season with great stats.

   63 Home Runs
   0.288 Batting Average

 What a year!

The main reason I find that this is odd, is if you use the YamlLoader and do zero processing on the data, and then immediately dump it back out again - it changes the file. I would expect the API's to be compatible (even if it requires configuration).