prompt: Your task is to convert an English description into an ASCII tree format using this style:
  ```
  export-default
   +--__snapshots__
   +--escaped
   |   `--__snapshots__
   `--export-default-from
       `--__snapshots__
  ```
  
  Convert this description:
  
  __tests__ is a head directory that contains 3 subdirectories: __snapshots__, core and services.
  At the main level, '__snapshots__' has no content.
  At the top level, 'core' retains 1 subdirectories: layer.
  Within directory hierarchy 'core / layer', 'layer' stores 1 subdirectories: config.
  Within directory hierarchy 'core / layer / config', 'config' is currently empty.
  In the root directory, 'services' awaits content.
  
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "__tests__\n +--__snapshots__\n +--core\n |   `--layer\n |       `--config\n `--services", "description": "__tests__ is a head directory that contains 3 subdirectories: __snapshots__, core and services.\nAt the main level, '__snapshots__' has no content.\nAt the top level, 'core' retains 1 subdirectories: layer.\nWithin directory hierarchy 'core / layer', 'layer' stores 1 subdirectories: config.\nWithin directory hierarchy 'core / layer / config', 'config' is currently empty.\nIn the root directory, 'services' awaits content.\n"}