Updates the entry line

        Parameters
        ----------
        key: 3-tuple of Integer, defaults to current cell
        \tCell to which code the entry line is updated

def update_entry_line(self, key=None):
        """Updates the entry line

        Parameters
        ----------
        key: 3-tuple of Integer, defaults to current cell
        \tCell to which code the entry line is updated

        """

        if key is None:
            key = self.actions.cursor

        cell_code = self.GetTable().GetValue(*key)

        post_command_event(self, self.EntryLineMsg, text=cell_code)