testdoc = '<?xml version="1.0" encoding="UTF-8" standalone=\'yes\' ?>\n<!-- comments aren\'t allowed before the <?xml?> tag,\n but they are allowed before the <!DOCTYPE> tag -->\n<?processing instructions are allowed in the same places as comments ?>\n<!DOCTYPE greeting [\n <!ELEMENT greeting (#PCDATA)>\n]>\n<greeting>Hello, world!</greeting>\n'