Fix doxygen warnings.

Using @since inside a style or event list causes doxygen warnings, replace with plain text.

See #15346.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74782 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/dirctrl.h

@@ -50,15 +50,18 @@ enum
     @library{wxcore}
     @category{ctrl}
     @appearance{genericdirctrl}
+    
+    @beginEventEmissionTable
     @event{EVT_DIRCTRL_SELECTIONCHANGED(id, func)}
           Selected directory has changed.
           Processes a @c wxEVT_DIRCTRL_SELECTIONCHANGED event type.
           Notice that this event is generated even for the changes done by the
           program itself and not only those done by the user.
-          @since 2.9.5
+          Available since wxWidgets 2.9.5.
     @event{EVT_DIRCTRL_FILEACTIVATED(id, func)}
           The user activated a file by double-clicking or pressing Enter.
-          @since 2.9.5
+          Available since wxWidgets 2.9.5.
+    @endEventTable
 */
 class wxGenericDirCtrl : public wxControl
 {

interface/wx/msgdlg.h

@@ -32,7 +32,7 @@ const char wxMessageBoxCaptionStr[] = "Message";
         appearance or be specially positioned if its label is not changed from
         the default one. Notice that using this button is not supported when
         showing a message box from non-main thread in wxOSX/Cocoa and it is not
-        supported in wxOSX/Carbon at all. @since 2.9.3.
+        supported in wxOSX/Carbon at all. Available since wxWidgets 2.9.3.
     @style{wxNO_DEFAULT}
         Makes the "No" button default, can only be used with @c wxYES_NO.
     @style{wxCANCEL_DEFAULT}
@@ -75,7 +75,7 @@ const char wxMessageBoxCaptionStr[] = "Message";
         combined with other styles to provide a fallback. For instance, using
         wxICON_AUTH_NEEDED | wxICON_QUESTION will show a shield symbol on
         Windows Vista or above and a question symbol on other platforms.
-        @since 2.9.5
+        Available since wxWidgets 2.9.5
     @style{wxSTAY_ON_TOP}
         Makes the message box stay on top of all other windows and not only
         just its parent (currently implemented only under MSW and GTK).