qdoc: Unnamed parameter results in default value of nullptr

struct Q_GUI_EXPORT QCocoaGLContext
{
    QT_DECLARE_NATIVE_INTERFACE(QCocoaGLContext)
    static QOpenGLContext *fromNative(NSOpenGLContext *, QOpenGLContext *shareContext = nullptr);
    virtual NSOpenGLContext *nativeContext() const = 0;
};

<function name="fromNative" fullname="QNativeInterface::QCocoaGLContext::fromNative" href="qnativeinterface-qcocoaglcontext.html#fromNative" status="active" access="public" location="qopenglcontext_platform.h" filepath="/Users/torarne/build/qt/6.0-qmake/qtbase/include/QtGui/../../../../../../dev/qt/6.0/qtbase/src/gui/kernel/qopenglcontext_platform.h" lineno="75" documented="true" meta="plain" virtual="non" const="false" static="true" final="false" override="false" type="QOpenGLContext *" signature="QOpenGLContext * fromNative(NSOpenGLContext *nativeContext, QOpenGLContext *shareContext)">
                    <parameter type="NSOpenGLContext *" name="nativeContext" default="nullptr"/>
                    <parameter type="QOpenGLContext *" name="shareContext" default="nullptr"/>
                </function>

struct Q_GUI_EXPORT QCocoaGLContext
{
    QT_DECLARE_NATIVE_INTERFACE(QCocoaGLContext)
    static QOpenGLContext *fromNative(NSOpenGLContext *nativeContext, QOpenGLContext *shareContext = nullptr);
    virtual NSOpenGLContext *nativeContext() const = 0;
};

<function name="fromNative" fullname="QNativeInterface::QCocoaGLContext::fromNative" href="qnativeinterface-qcocoaglcontext.html#fromNative" status="active" access="public" location="qopenglcontext_platform.h" filepath="/Users/torarne/build/qt/6.0-qmake/qtbase/include/QtGui/../../../../../../dev/qt/6.0/qtbase/src/gui/kernel/qopenglcontext_platform.h" lineno="75" documented="true" meta="plain" virtual="non" const="false" static="true" final="false" override="false" type="QOpenGLContext *" signature="QOpenGLContext * fromNative(NSOpenGLContext *nativeContext, QOpenGLContext *shareContext)">
                    <parameter type="NSOpenGLContext *" name="nativeContext" default=""/>
                    <parameter type="QOpenGLContext *" name="shareContext" default="nullptr"/>
                </function>

/*!
  \fn QOpenGLContext *QNativeInterface::QCocoaGLContext::fromNative(NSOpenGLContext *nativeContext, QOpenGLContext *shareContext = nullptr)

  Hepps
*/