filter special ascii commands from output, otherwise jenkins cannot read the test output xml file

src/commands.hxx

@@ -436,11 +436,8 @@ class Script: public QObject {
     };
   public:
     static QString xmlattr(QString attr, bool br = false) {
-      attr.replace("&", "&")//.replace(" ", " ")
+      if (br) return attr.toHtmlEscaped().replace("\n", "<br/>");
-        .replace("\"", "&quot;");
+      return attr.toHtmlEscaped();
-      if (br) attr.replace("\n", "<br/>");
-      attr.replace("<", "&lt;").replace(">", "&gt;");
-      return attr;
     }
     static QString xmlstr(const std::string& attr) {
       return xmlstr(QString::fromStdString(attr));
@@ -899,6 +896,7 @@ class Script: public QObject {
       QString prefix
         (QDateTime::currentDateTime().toString("yyyy-MM-dd HH:mm:ss "));
       Command* cmd(command?command:_command);
+      for (QChar& c: text) if (c<32) c='?';
       if (cmd)
         prefix += QString("%2:%3%1 ")
           .arg(QString(cmd->indent(), QChar(' ')))
@@ -2105,7 +2103,8 @@ class If: public Command {
         "less (as integer), bigger (as integer). "
         "Match allows a regular expression. "
         "The second variant checks for a text in a selector, "
-        "similar to command exists. "
+        "similar to command exists. The text can be empty to just "
+        "check for the existence of a selector. "
         "There is an optional else part.";
     }
     QString command() const {