update stdlib append after testing

ast/eval.go

@@ -56,7 +56,7 @@ func (t *Token) Eval(funcs FuncTable, vars VarTable) *Token {
         if f == nil {
             if !eligibleForSystemCall {
                 log.Log(log.DEBUG,
-                    "could not find definition for symbol " + ret.Inner.(string), 
+                    "could not find definition for symbol " + ret.Inner.(string),
                     "eval")
                 return nil
             }