Class Format

// Log an XML document with encoding that does not support certain special
// characters.
const xml = '<root><a><b>ಠ‿ಠ</b><b>ಠ‿ಠ</b></a></root>';
const document = XmlService.parse(xml);
const output =
    XmlService.getRawFormat().setEncoding('ISO-8859-1').format(document);
Logger.log(output);

// Log an XML document with each child node indented four spaces.
const xml = '<root><a><b>Text!</b><b>More text!</b></a></root>';
const document = XmlService.parse(xml);
const output = XmlService.getCompactFormat().setIndent('    ').format(document);
Logger.log(output);

// Log an XML document with several spaces and a pipe character in place of line
// breaks.
const xml = '<root><a><b>Text!</b><b>More text!</b></a></root>';
const document = XmlService.parse(xml);
const output =
    XmlService.getRawFormat().setLineSeparator(' | ').format(document);
Logger.log(output);