is\U文件在Ansible中产生语法错误

我的项目使用Ansible 2.3.2.0。在这个项目中,我有一个任务使用 is_file 测试:

- name: Create repository.ini file
  template: src="{{ playbook_dir }}/../../../repository.ini" dest="/{{ repository_dir }}/repository.ini"
  when: "{{ playbook_dir }}/../../..//repository.ini"|is_file

此任务产生以下错误:

The offending line appears to be:

  template: src="{{ playbook_dir }}/../../../repository.ini" dest="/{{ jse_repository_dir }}/repository.ini"
  when: "{{ playbook_dir }}/../../../repository.ini"|is_file
                                                     ^ here
We could be wrong, but this one looks like it might be an issue with
missing quotes.  Always quote template expression brackets when they
start a value. For instance:
. . . . 

我尽了我所能,但没有成功。