Take prefix as Cow<'static, str>

[GnomedDev]

No description provided.

[kangalio]

This is admittedly a tiny amount of churn, but for an even more minuscule amount of resource saving...

[GnomedDev]

Small incremental changes are how we improve. This has bugged me for absolutely ages though

[kangalio]

Alright. I personally feel that the type used for the prefix is so negligible for performance (prefix is static, and dynamic_prefix is only convenience for the purer stripped_dynamic_prefix), that the decision should be purely based on usability. And Rust's default go-to string type for everything that's not specialized is just String, hence to me String does feel cleaner than Cow<'static, str> here. But I don't really feel like bickering about this because I suppose in the end it's a small change