Fix Sip coverage test failure on debian nightly builds

(doxygen version does not support @cond)

Author: nyalldawson

src/gui/qgsidentifymenu.h

@@ -23,8 +23,9 @@
 #include "qgsmaptoolidentify.h"
 #include "qgsvectorlayer.h"
 
+// not part of public API
 ///@cond
-/// not part of public API
+//! @note not available in Python bindings
 class CustomActionRegistry : public QgsMapLayerActionRegistry
 {
     Q_OBJECT

src/gui/qgsmapoverviewcanvas.h

@@ -116,11 +116,10 @@ class GUI_EXPORT QgsMapOverviewCanvas : public QWidget
 };
 
 
-
+// not part of public API
 ///@cond
-/// not part of public API
-
-//! widget that serves as rectangle showing current extent in overview
+//! Widget that serves as rectangle showing current extent in overview
+//! @note not available in Python bindings
 class QgsPanningWidget : public QWidget
 {
     Q_OBJECT
@@ -137,5 +136,4 @@ class QgsPanningWidget : public QWidget
 };
 ///@endcond
 
-
 #endif

src/gui/symbology-ng/qgssizescalewidget.h

@@ -68,8 +68,9 @@ class GUI_EXPORT QgsSizeScaleWidget : public QgsDataDefinedAssistant, private Ui
 };
 
 
+// not part of public API
 ///@cond
-/// not part of public API
+//! @note not available in Python bindings
 class ItemDelegate : public QItemDelegate
 {
     Q_OBJECT