add

@@ -10,10 +10,10 @@
   when:  stat_result.stat.exists == False
 
 
-# make sure vaviable exist
-- name: make sure variable nameservers exists
+# make sure vaviable [nameserver] exist
+- name: "make sure variable [nameservers] exists"
   fail: 
-    msg: "variable nameservers not exist "
+    msg: "variable [nameservers] not exist "
   when: nameservers == ''