prompt: Your task is to convert an English description into an ASCII tree format using this style:
  ```
  main
   +--java
   |   `--com
   |       `--example
   |           `--worker
   `--resources
       `--META-INF
           `--gradle-plugins
  ```
  
  Convert this description:
  
  validation is a principal directory that features 2 subdirectories: __tests__ and rules.
  In the root directory, Inside '__tests__', you'll find it stands empty.
  At the top level, 'rules' has 1 child directories: custom.
  In nested path 'rules → custom', 'custom' is barren.
  
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "validation\n +--__tests__\n `--rules\n     `--custom", "description": "validation is a principal directory that features 2 subdirectories: __tests__ and rules.\nIn the root directory, Inside '__tests__', you'll find it stands empty.\nAt the top level, 'rules' has 1 child directories: custom.\nIn nested path 'rules \u2192 custom', 'custom' is barren.\n"}