regex: some minor polish

I think I already did a clean-up of this crate when I moved it to regex
1.9, so the polish here is very minor.

crates/regex/src/lib.rs

@@ -3,8 +3,10 @@ An implementation of `grep-matcher`'s `Matcher` trait for Rust's regex engine.
 */
 #![deny(missing_docs)]
 
-pub use crate::error::{Error, ErrorKind};
-pub use crate::matcher::{RegexCaptures, RegexMatcher, RegexMatcherBuilder};
+pub use crate::{
+    error::{Error, ErrorKind},
+    matcher::{RegexCaptures, RegexMatcher, RegexMatcherBuilder},
+};
 
 mod ast;
 mod config;