Why not prettifying in a post-processing step?

I mean, if you happen to have libxml2 installed, then you have the unbeatible xmllint utility at your disposal: 

rg@something:/tmp$ echo '<PrimaryServers><Server Name="New_2"/><Server
+ Name="New_1"/></PrimaryServers>' | xmllint --format -

[download]
This results in a beautiful XML layout: 
<?xml version="1.0"?>
<PrimaryServers>
  <Server Name="New_2"/>
  <Server Name="New_1"/>
</PrimaryServers>

[download]

rg0now

In reply to Re: Formatting in XML::Twig->print() by rg0now
in thread Formatting in XML::Twig->print() by Nitrox

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