require XML::LibXML::PrettyPrint;
XML::LibXML::PrettyPrint
    -> new( element => {inline=>['name']} )
    -> pretty_print($doc)
    -> toFile($file);

##</code><code>##

<configuration>
  <property>
    <name>test1</name>
  </property>
  <property>
    <name>test2</name>
  </property>
</configuration>

##</code><code>##

<configuration>
  <property>
    <name>
      test1
    </name>
  </property>
  <property>
    <name>
      test2
    </name>
  </property>
</configuration>

##</code><code>##

require XML::LibXML::PrettyPrint;
XML::LibXML::PrettyPrint->pretty_print($doc)->toFile($file);