Makes code more rusty/idiomatic

[legendofmiracles]

Most notable one in my opinion is the expect ⇒ unwrap_or_else, the reason being that expect will always call the function - only using the result when needed (so impure)

There are stilll some clippy lints, but at the current time most of them are false positives or just wrong (they produce compiler errors when applied)

[VuiMuich]

There are stilll some clippy lints, but at the current time most of them are false positives or just wrong (they produce compiler errors when applied)

Might be a result of building with nightly rust, right?
So maybe reporting this to the floppy repo would be nice.

Great work on this PR btw.

[legendofmiracles]

Thank you, I can reproduce this with the latest nightly - but the version in the nix flake still works.
The issue was already fixed, and the latest release also contains it: rust-num/num-bigint#218.
But it seems we'll have to be waiting until the crate that depends on it, also updates its version.

EDIT: this pr fixes compilation: #265

[elkowar]

Thanks!