Formatting after a transformer

[AK.E]

So I'm using a transformer to output my changes to an xml file. Is there a way that i could retain the proper formatting and whitespace instead of it being all on one line?

For example:
I'd rather have it like:

code:

<person>       <name>Mike</name>       <age>24</age> </person>

Instead of:

code:

<person><name>Mike</name><age>24</age></person>

[Tony]

Don't XML viewer applications format the contents anyway? I'm pretty sure that Firefox does.