anchor.diff:          eo_page  = get_page_by_name( iv_action ).
           ev_state = gc_event_state-new_page.
         WHEN 'abapgithome'.
  -        cl_gui_frontend_services=>execute( document = gc_abapgit_homepage ).
  +        cl_gui_frontend_services=>execute( EXPORTING document = gc_abapgit_homepage
  +                                           EXCEPTIONS OTHERS = 1 ).
  +        IF sy-subrc <> 0.
  +          _raise 'Opening page in external browser failed.'.
  +        ENDIF.
           ev_state = gc_event_state-no_more_act.
         WHEN 'abapgit_installation'.
           abapgit_installation( ).
  
positive.code: 
      METHODS show_url
        IMPORTING iv_url TYPE clike.
  
      METHODS view
        IMPORTING iv_html TYPE string.
  
negative.code:     METHODS go_home
        RAISING lcx_exception.
  
      METHODS back
        RETURNING VALUE(rv_exit) TYPE xfeld
        RAISING   lcx_exception.
  