stdlib Call, fg, bg, $, and cd functions. wow

cmd/repl.go

@@ -109,12 +109,16 @@ func main() {
         }
 
         result, unwrap := userInput.Eval(funcs, vars)
-        if unwrap {
-            result = result.Inner.(*ast.Token)
-        }
-        for i := result; i != nil; i = i.Next {
-            fmt.Printf(i.String() + " ")
+        if result != nil {
+            if result.Tag == ast.LIST && unwrap {
+                result = result.Inner.(*ast.Token)
+            }
+
+            for i := result; i != nil; i = i.Next {
+                fmt.Printf(i.String() + " ")
+            }
         }
+
         fmt.Printf("\n")
     }
 }