QML TextEdit: How can I change the richtext header?

Saurausli

I'd like to change the header from a richtext from:

<head><meta name="qrichtext" content="1" /><style type="text/css">
p, li { white-space: pre-wrap; }
</style></head>

to :

<head><meta name="qrichtext" content="1" /><style type="text/css">
p, li { white-space: pre; }
</style></head>

Is there a way to change white-space?

Here is my code:

import QtQuick 2.12
import QtQuick.Window 2.12

Window {
    visible: true
    width: 640
    height: 480
    TextEdit{
        anchors.fill: parent
        anchors.margins: 10
        textFormat: Qt.RichText
        text: "<pre> test </pre>"
    }
}

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QML TextEdit: How can I change the richtext header?