Fix documentation errors (issue #1834)

include/cef_keyboard_handler.h

@@ -48,11 +48,13 @@
 /*--cef(source=client)--*/
 class CefKeyboardHandler : public virtual CefBase {
  public:
+  ///
   // Called before a keyboard event is sent to the renderer. |event| contains
   // information about the keyboard event. |os_event| is the operating system
   // event message, if any. Return true if the event was handled or false
   // otherwise. If the event will be handled in OnKeyEvent() as a keyboard
   // shortcut set |is_keyboard_shortcut| to true and return false.
+  ///
   /*--cef()--*/
   virtual bool OnPreKeyEvent(CefRefPtr<CefBrowser> browser,
                              const CefKeyEvent& event,