(Reported on Wiki by Yoichi KODAMA)

I add it to be able to choose SPACE in Choices. For example, I can choose 4 of the following.

' ' <= SPACE (default. NOT set an optional parameter)
'-t apple' <= (set an optional parameter)
'-t banana' <= (set an optional parameter)
'-t cinnamon' <= (set an optional parameter)

However, SPACE is deleted when I convert it in Parameters. Could you permit SPACE?
I can use String Parameter instead of Choices, but, in String Parameter, I may make a typo, and the input of the keyboard is troublesome.

Thanks!

YK