fix the many-body-script and lex-singlet problems

Signed-off-by: Ava Hahn <ava@aidanis.online>

src/bin/main.rs

@@ -62,7 +62,8 @@ fn main() {
         match user_doc {
             Ok(line) => {
                 rl.add_history_entry(line.as_str());
-                let l = line.as_str().to_owned();
+                let  l = line.as_str().to_owned();
+
                 match lex(&l) {
                     Ok(a) => match eval(&a, &mut syms) {
                         Ok(a) => println!("{}", a),