prompt: Your task is to convert an English description into an ASCII tree format using this style:
  ```
  gradle
   +--api
   |   `--internal
   |       `--initialization
   |           `--loadercache
   +--internal
   |   `--serialize
   |       `--kryo
   `--tooling
       `--internal
           `--provider
               `--serialization
  ```
  
  Convert this description:
  
  src is a head directory that comprises 3 subdirectories: black, blackd and blib2to3.
  At the main level, 'black' comprises 1 folders: resources.
  Within directory hierarchy 'black > resources', Inside 'resources', you'll find it has no content.
  In the root directory, The 'blackd' folder has yet to be populated.
  In the root directory, 'blib2to3' carries 1 folders: pgen2.
  In nested path 'blib2to3 → pgen2', 'pgen2' stands empty.
  Back to the top level.
  
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "src\n +--black\n |   `--resources\n +--blackd\n `--blib2to3\n     `--pgen2", "description": "src is a head directory that comprises 3 subdirectories: black, blackd and blib2to3.\nAt the main level, 'black' comprises 1 folders: resources.\nWithin directory hierarchy 'black > resources', Inside 'resources', you'll find it has no content.\nIn the root directory, The 'blackd' folder has yet to be populated.\nIn the root directory, 'blib2to3' carries 1 folders: pgen2.\nIn nested path 'blib2to3 \u2192 pgen2', 'pgen2' stands empty.\nBack to the top level.\n"}