Fix typos in documentation of FL_APP_ACTIVATE

FL/Enumerations.H

@@ -338,7 +338,7 @@ enum Fl_Event { // events
    receive this event right before the menu appears, providing an opportunity
    to update menu item states and activation. */
   FL_BEFORE_MENU        = 29,
-  /** Sent when the application is activate an becomes topmost and focused.
+  /** Sent when the application is activated and becomes topmost and focused.
    Not supported on X11.
    \see Fl::add_handler() */
   FL_APP_ACTIVATE       = 30,

src/Fl.cxx

@@ -940,6 +940,7 @@ static handler_link *handlers = 0;
     Under X11, this event requires the libXrandr.so shared library to be
     loadable at run-time and the X server to implement the RandR extension.
   - \ref FL_ZOOM_EVENT events.
+  - \ref FL_APP_ACTIVATE and \ref FL_APP_DEACTIVATE events.
   - System events that FLTK does not recognize.  See fl_xevent.
   - \e Some other events when the widget FLTK selected returns
     zero from its handle() method.  Exactly which ones may change