Cool to see this - ergonomic syntax will make it easier to recommend Lua. Hope the PUC team aligns with this.

Also, I love this kind of pragmatism:

> Exponentiation assignment a ^= b has been deliberately omitted to avoid a predictable pitfall: this is how xor assignment is written in most other computer languages. Also, a syntax for exponentiation assignment is rarely asked for.

A ‘defer’ for closing files or deleting temp files at the end of a script will make life more enjoyable.