Clean up warnings and formatting.

src/syntax/tokens.rs

@@ -3,7 +3,7 @@ use logos::{Lexer, Logos};
 use std::fmt;
 use std::num::ParseIntError;
 
-#[derive(Logos, Clone, Debug, PartialEq)]
+#[derive(Logos, Clone, Debug, PartialEq, Eq)]
 pub enum Token {
     #[token("=")]
     Equals,