Fix html documentation warnings.

See #15346.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74689 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/html/helpctrl.h

@@ -194,7 +194,7 @@ public:
         Sets whether the help frame should prevent application from exiting
         if it's the only remaining top level window.
 
-        @enable
+        @param enable
             If @true, the application will not quit unless the help frame is
             closed. Default is @false, i.e. the application does exit if only
             the help window remains opened.

interface/wx/html/htmlcell.h

@@ -332,6 +332,8 @@ public:
 
         @param window
             interface to the parent HTML window
+        @param rePos
+            Position to show cursor.
 
         @since 3.0
      */