u'''Move forward through the history list, fetching the next command.

def next_history(self, current): # (C-n)
        u'''Move forward through the history list, fetching the next command. '''
        if self.history_cursor < len(self.history) - 1:
            self.history_cursor += 1
            current.set_line(self.history[self.history_cursor].get_line_text())