[xml] Pretty print in libxml2

[shtil]

Hi, 


I wonder if there is a way to pretty print xml. 
Referring to the examples for xmlWriter I want 



<?xml version="1.0" encoding="ISO-8859-1"?> 
<EXAMPLE><!--This is a comment with special chars: <äöü>--><ORDER version="1.0" 
xml:lang="de"><!--This is another comment with special chars: 
<äöü>--><HEADER><X_ORDER_ID>0000053535</X_ORDER_ID><CUSTOMER_ID>1010</CUSTOMER_ID><NAME_1>Müller</NAME_1><NAME_2>Jörg</NAME_2></HEADER><ENTRIES><ENTRY><ARTICLE>&lt;Test&gt;</ARTICLE><ENTRY_NO>10</ENTRY_NO></ENTRY><ENTRY><ARTICLE>&lt;Test
 2&gt;</ARTICLE><ENTRY_NO>20</ENTRY_NO></ENTRY></ENTRIES><FOOTER><TEXT>This is 
a text.</TEXT></FOOTER></ORDER></EXAMPLE> 


to look like: 



<?xml version="1.0" encoding="ISO-8859-1"?> 
<EXAMPLE> 
<!--This is a comment with special chars: <äöü>--> 
<ORDER version="1.0" xml:lang="de"> 
<!--This is another comment with special chars: <äöü>--> 
<HEADER> 
<X_ORDER_ID>0000053535</X_ORDER_ID> 
<CUSTOMER_ID>1010</CUSTOMER_ID> 
<NAME_1>Müller</NAME_1> 
<NAME_2>Jörg</NAME_2> 
</HEADER> 
<ENTRIES> 
<ENTRY> 
<ARTICLE>&lt;Test&gt;</ARTICLE> 
<ENTRY_NO>10</ENTRY_NO> 
</ENTRY> 
<ENTRY> 
<ARTICLE>&lt;Test 2&gt;</ARTICLE> 
<ENTRY_NO>20</ENTRY_NO> 
</ENTRY> 
</ENTRIES> 
<FOOTER> 
<TEXT>This is a text.</TEXT> 
</FOOTER> 
</ORDER> 
</EXAMPLE> 



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