export vars fixed. tests pass

tests/test_lib_vars.rs

@@ -7,7 +7,7 @@ mod var_lib_tests {
     #[test]
     fn test_variable_export_and_lookup() {
         let doc1 = "(export test 1)";
-        let doc2 = "(echo test)";
+        let doc2 = "(concat test)";
         let result = "1";
         let vt = Rc::new(RefCell::new(VTable::new()));
         let ft: Rc<RefCell<FTable>>;
@@ -34,6 +34,7 @@ mod var_lib_tests {
                     },
 
                     Ok(ctr) => {
+                        println!("{:#?}", vt);
                         match ctr {
                             Ctr::None => assert!(true),
                             _ => assert!(false)