Function paintEvent

src/plugins/git/gui/giteditor.cpp:34–37

        return { textEdit->extraAreaWidth(), 0 };
    }
    void paintEvent(QPaintEvent *event) override
    {
        textEdit->extraAreaPaintEvent(event);
    }
    void changeEvent(QEvent *event) override
    {
        if (event->type() == QEvent::PaletteChange)