in junit-platform-reporting/src/main/java/org/junit/platform/reporting/legacy/xml/XmlReportWriter.java [326:334]
private static boolean isAllowedXmlCharacter(int codePoint) {
// source: https://www.w3.org/TR/xml/#charsets
return codePoint == 0x9 //
|| codePoint == 0xA //
|| codePoint == 0xD //
|| (codePoint >= 0x20 && codePoint <= 0xD7FF) //
|| (codePoint >= 0xE000 && codePoint <= 0xFFFD) //
|| (codePoint >= 0x10000 && codePoint <= 0x10FFFF);
}