prompt: Your task is to convert an English description into an ASCII tree format using this style:
  ```
  test
   +--env
   |   `--cypress
   |       `--e2e
   +--failing
   |   `--cypress
   |       `--e2e
   +--invalid
   |   `--cypress
   |       `--e2e
   `--successful
       `--cypress
           `--e2e
  ```
  
  Convert this description:
  
  opencontainers is a principal directory that gathers 2 subdirectories: go-digest and image-spec.
  At the top level, Inside 'go-digest', you'll find it is unpopulated.
  At the main level, 'image-spec' keeps 1 test-related directories.
  At level 2, in directory path 'image-spec / specs-go', 'specs-go' incorporates 1 test-related directories.
  Within directory hierarchy 'image-spec / specs-go / v1', 'v1' is vacant.
  
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "opencontainers\n +--go-digest\n `--image-spec\n     `--specs-go\n         `--v1", "description": "opencontainers is a principal directory that gathers 2 subdirectories: go-digest and image-spec.\nAt the top level, Inside 'go-digest', you'll find it is unpopulated.\nAt the main level, 'image-spec' keeps 1 test-related directories.\nAt level 2, in directory path 'image-spec / specs-go', 'specs-go' incorporates 1 test-related directories.\nWithin directory hierarchy 'image-spec / specs-go / v1', 'v1' is vacant.\n"}