style: apply rustfmt

Maybe 2024 changes?

Note that we now set `edition = "2024"` explicitly in `rustfmt.toml`.
Without this, it seems like it's possible in some cases for rustfmt to
run under an older edition's style. Not sure how though.

crates/core/flags/mod.rs

@@ -36,7 +36,7 @@ pub(crate) use crate::flags::{
     },
     hiargs::HiArgs,
     lowargs::{GenerateMode, Mode, SearchMode, SpecialMode},
-    parse::{parse, ParseResult},
+    parse::{ParseResult, parse},
 };
 
 mod complete;