Write Xml to file with Indentation.

[Jayashree <jaya risktechnologysolutions com>]

Hi,

I am using the document object write_to_file method to create my output 
file.
But it writes in as

<root><foo>Bar</foo></root>

but i want the output to be written with Indentation as given below

<root>
<foo>Bar</foo>
</root>

How can i achieve it.

regards,
Jaya