Extra xml added after config in export is wrong

[mdzik]

I found that XML saving in XXX_config_P00_000000.xml is not working right

The xml file looks like this:

<?xml version="1.0"?>
<CLBConfig version="2.0" output="output/">
    <!-- this is OK -->
</CLBConfig>
<Run model="d2q9_kuper">
    <Code version="v6.0-beta-529-g31f6a5f" precision="double" cross="GPU" />
</Run>

I get this error during post-processing parsing:

xml.sax._exceptions.SAXParseException: /XXXXX/run_config_P00_00000000.xml:47:0: junk after document element

Which refers to part. this is wrong: XML states that document should have single root element

% xmllint NX1024_prom/id1/output/run_config_P00_00000000.xml                                                                                                                               ~/praca/bench_MP_Laplace
NX1024_prom/id1/output/run_config_P00_00000000.xml:47: parser error : Extra content at the end of the document
<Run model="d2q9_kuper">
^