XMLOutputter can produce wrong result with TextMode.TRIM_FULL_WHITE

[rolfl]

    Element root = new Element("root");
    root.addContent(new Text(" "));
    root.addContent(new Text("x"));
    root.addContent(new Text(" "));
    Format mf = Format.getRawFormat();
    mf.setTextMode(TextMode.TRIM_FULL_WHITE);
    XMLOutputter xout = new XMLOutputter(mf);
    String output = xout.outputString(root);
    assertEquals("<root> x </root>", output);

but The output is not actually:

"<root> x </root>"

it is:

"<root>x</root>"

which is wrong...

For reference, it should be identical to the output of (this works...):

    Element root = new Element("root");
    root.addContent(new Text(" x "));
    Format mf = Format.getRawFormat();
    mf.setTextMode(TextMode.TRIM_FULL_WHITE);
    XMLOutputter xout = new XMLOutputter(mf);
    String output = xout.outputString(root);
    assertEquals("<root> x </root>", output);