code: def load_bookmark(self, slot_num):
          
          bookmarks = CONF.get('editor', 'bookmarks')
          if slot_num in bookmarks:
              filename, line_num, column = bookmarks[slot_num]
          else:
              return
          if not osp.isfile(filename):
              self.last_edit_cursor_pos = None
              return
          self.load(filename)
          editor = self.get_current_editor()
          if line_num < editor.document().lineCount():
              linelength = len(editor.document()
                               .findBlockByNumber(line_num).text())
              if column <= linelength:
                  editor.go_to_line(line_num + 1, column)
              else:
                  # Last column
                  editor.go_to_line(line_num + 1, linelength)
docs: Set cursor to bookmarked file and position.