prompt: Your task is to convert the following English description into an ASCII tree format.
  
  postcss is a primary directory that organizes 3 subdirectories: docs, lib and test.
  At the main level, 'docs' encapsulates 1 contained folders: guidelines.
  At level 2, in directory path 'docs > guidelines', The 'guidelines' data structure remains unused.
  Back to the top level.
  At the main level, 'lib' is barren.
  At the top level, The 'test' container remains unused.
  
  
  Format your response in this style:
  ```
  gradle
   +--api
   |   `--internal
   |       `--initialization
   |           `--loadercache
   +--internal
   |   `--serialize
   |       `--kryo
   `--tooling
       `--internal
           `--provider
               `--serialization
  ```
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "postcss\n +--docs\n |   `--guidelines\n +--lib\n `--test", "description": "postcss is a primary directory that organizes 3 subdirectories: docs, lib and test.\nAt the main level, 'docs' encapsulates 1 contained folders: guidelines.\nAt level 2, in directory path 'docs > guidelines', The 'guidelines' data structure remains unused.\nBack to the top level.\nAt the main level, 'lib' is barren.\nAt the top level, The 'test' container remains unused.\n"}