xmlTag function
Wrap text in an XML tag.
Implementation
String xmlTag(String tag, String content, {Map<String, String>? attrs}) {
final attrStr =
attrs?.entries.map((e) => ' ${e.key}="${escapeXml(e.value)}"').join('') ??
'';
return '<$tag$attrStr>\n$content\n</$tag>';
}