prompt: Your task is to convert an English description into an ASCII tree format using this style:
  ```
  test
   +--__snapshots__
   +--fixtures
   |   `--has-vulnerabilities
   `--utils
       `--responses
  ```
  
  Convert this description:
  
  js is a source directory that holds 2 subdirectories: core and src.
  At the top level, 'core' retains 1 contained folders: src.
  In nested path 'core / src', 'src' is currently empty.
  Back to the top level.
  At the main level, Inside 'src', you'll find it remains unused.
  
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "js\n +--core\n |   `--src\n `--src", "description": "js is a source directory that holds 2 subdirectories: core and src.\nAt the top level, 'core' retains 1 contained folders: src.\nIn nested path 'core / src', 'src' is currently empty.\nBack to the top level.\nAt the main level, Inside 'src', you'll find it remains unused.\n"}