Renpy 6.12.1: How do I show a variable in the text?

要怎麼在對話的text中秀出變數，Renpy 官網提供以下三種方法：

$ food = "apple sauce"

"I would like to try some %(food)s, please."
"I would like to try some %s, please." % food
"I would like to try some " + food + ", please."

 不過，我在Renpy 6.12.1試的結果，目前只支援第一種：

"I would like to try some %(food)s, please."

其它兩種，不確定以前有沒有支援，目前看來是不行用的。