refactor: fix clippy warnings

[mainrs]

I ran cargo clippy --fix to fix some linting errors. If you want try it out on the current commit and see what it shows you as output. Make sure to use cargo clippy to get the errors printed to the console. Since you seem to be new to Rust it might be a good idea!

[Ruturajn]

Hi,
Thanks for the Pull Request. You are right, this is my first Rust based project. I will check this out, and let you know.

[mainrs]

I'll open another one to remove the large match arm. It is, objectively speaking, ugly.