I meant that Rust is probably not a good choice for a new shell scripting environment, not that Rust is hard to test. I was responding to the claim "Unix shell

I meant that Rust is probably not a good choice for a new shell scripting environment, not that Rust is hard to test. I was responding to the claim "Unix shell environments have always been ad hoc and poorly tested", which is a bad thing and is worth fixing in and of itself.