Fix ruff lints

[AngheloAlf]

Newest ruff version enabled a bunch of new lints by default.

Fixing them all would be a huge PR, so instead I fixed the ones that required minimal changes and left the remaining ones for discussion.

Here is the list of all the lints that were enabled by ruff and I fixed.

https://docs.astral.sh/ruff/rules/unnecessary-generator-set/
https://docs.astral.sh/ruff/rules/unnecessary-collection-call/
https://docs.astral.sh/ruff/rules/shebang-not-executable/
https://docs.astral.sh/ruff/rules/print-empty-string/
https://docs.astral.sh/ruff/rules/for-loop-writes/
https://docs.astral.sh/ruff/rules/slice-to-remove-prefix-or-suffix/
https://docs.astral.sh/ruff/rules/implicit-string-concatenation-in-collection-literal/
https://docs.astral.sh/ruff/rules/manual-list-copy/
https://docs.astral.sh/ruff/rules/unnecessary-placeholder/
https://docs.astral.sh/ruff/rules/dict-index-missing-items/
https://docs.astral.sh/ruff/rules/if-stmt-min-max/
https://docs.astral.sh/ruff/rules/subprocess-run-without-check/
https://docs.astral.sh/ruff/rules/explicit-f-string-type-conversion/
https://docs.astral.sh/ruff/rules/unnecessary-iterable-allocation-for-first-element/
https://docs.astral.sh/ruff/rules/unused-unpacked-variable/
https://docs.astral.sh/ruff/rules/negate-equal-op/
https://docs.astral.sh/ruff/rules/raise-vanilla-class/
https://docs.astral.sh/ruff/rules/type-check-without-type-error/
https://docs.astral.sh/ruff/rules/open-alias/
https://docs.astral.sh/ruff/rules/lru-cache-with-maxsize-none/

I think it would be nice to enable some of the remaining ones, but I didn't want to make a massive PR.