What's a List Enclosure?

The main use of a list enclosure is to represent closure code. A list encloses open parentheses and then some things and then close around parentheses. It's basically this is more or less with there's some special cases, but more or less it's a function call. If you are not used to this syntax, it will look weird to you. You should not let that dissuade you from trying the language.