Fix parameter syntax and errors

[harkabeeparolus]

I fixed some syntax errors, ran ShellCheck, and cleaned up the code a little.

[ethancedwards8]

We're always looking for code improvements! Thank you. Could you rerun everything on the current code base?

[harkabeeparolus]

We're always looking for code improvements! Thank you. Could you rerun everything on the current code base?

Sure, I'm happy to help, and I'm an experienced bash developer. Would you like me to clean up the whole scripts directory while I'm at it? I noticed that ShellCheck finds more errors and warnings. And in general I find that ShellCheck and Shellharden do the right thing, making bash code more robust.

[ethancedwards8]

Sure. That would be great! Thank you!