fix: clippy warnings.

crates/oxc_regular_expression/src/display.rs

@@ -63,7 +63,7 @@ impl<'a> Display for Alternative<'a> {
         write_join_with(f, "", &self.body, |iter| {
             let next = iter.next()?;
             let Some(next) = as_character(next) else { return Some(next.to_string()) };
-            let peek = iter.peek().and_then(|it| as_character(*it));
+            let peek = iter.peek().and_then(|it| as_character(it));
             let (result, eat) = character_to_string(next, peek);
             if eat {
                 _ = iter.next();
@@ -221,7 +221,7 @@ impl<'a> Display for CharacterClass<'a> {
             write_join_with(f, sep, &self.body, |iter| {
                 let next = iter.next()?;
                 let Some(next) = as_character(next) else { return Some(next.to_string()) };
-                let peek = iter.peek().and_then(|it| as_character(*it));
+                let peek = iter.peek().and_then(|it| as_character(it));
                 let (result, eat) = character_to_string(next, peek);
                 if eat {
                     _ = iter.next();
@@ -388,7 +388,7 @@ fn character_to_string(
             format!(r"\{ch}")
         }
         CharacterKind::Symbol => format!("{ch}"),
-        CharacterKind::Null => format!(r"\0"),
+        CharacterKind::Null => String::from(r"\0"),
         CharacterKind::UnicodeEscape => {
             // we remove the leading `0x` of our 4 digit hex number.
             let hex = &format!("{cp:#4X}")[2..];
@@ -503,7 +503,6 @@ mod test {
     fn test_display(allocator: &Allocator, (source, expect, unicode): Case) {
         use crate::{Parser, ParserOptions};
         let expect = expect.unwrap_or(source);
-        dbg!(source);
         let parsed_utf16 =
             Parser::new(allocator, source, ParserOptions::default()).parse().unwrap();
         assert_eq!(expect, parsed_utf16.to_string());