switched to Arc instead of Rc for input strings

src/prompt/readline.rs

@@ -68,7 +68,7 @@ impl Validator for FernReadline {
 	fn validate(&self, ctx: &mut rustyline::validate::ValidationContext) -> rustyline::Result<rustyline::validate::ValidationResult> {
 		return Ok(ValidationResult::Valid(None));
 		let mut tokens = vec![];
-		let tk_stream = LexStream::new(Rc::new(ctx.input().to_string()), LexFlags::empty());
+		let tk_stream = LexStream::new(Arc::new(ctx.input().to_string()), LexFlags::empty());
 		for tk in tk_stream {
 			if tk.is_err() {
 				return Ok(ValidationResult::Incomplete)