As others have suggested, I'd suggest you don't worry about the formatting of the XML document with respect to simply using it.

However, if you're trying to understand a file, it's frequently nice to have it formatted. I use xmllint --format inputfile >outputfile to reformat an XML document when I need to open it in an editor just to check it out structurally.

...roboticus

When your only tool is a hammer, all problems look like your thumb.