aa-edit-mode is Major mode for AA (アスキーアート, known as Shift_JIS art). https://en.wikipedia.org/wiki/Shift_JIS_art https://ja.wikipedia.org/wiki/%E3%82%A2%E3%82%B9%E3%82%AD%E3%83%BC%E3%82%A2%E3%83%BC%E3%83%88 `aa-edit-mode' supports .mlt format. http://yaruo.wikia.com/wiki/%E3%82%84%E3%82%8B%E5%A4%AB%E3%82%B9%E3%83%AC%E7%94%A8MLT%E5%8F%8E%E9%9B%86%E6%89%80