prompt: Your task is to convert an English description into an ASCII tree format using this style:
  ```
  tests
   +--helpers
   |   `--browser
   +--regression
   |   `--libs
   +--test262
   |   `--test262
   `--unit
       `--fixtures
  ```
  
  Convert this description:
  
  refs is a master directory that bundles 2 subdirectories: json-schema-2019-09 and json-schema-2020-12.
  At the top level, 'json-schema-2019-09' hosts 1 child directories: meta.
  In nested path 'json-schema-2019-09 / meta', 'meta' awaits content.
  In the root directory, 'json-schema-2020-12' has 1 folders: meta.
  At level 2, in directory path 'json-schema-2020-12 → meta', The 'meta' data structure remains unused.
  
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "refs\n +--json-schema-2019-09\n |   `--meta\n `--json-schema-2020-12\n     `--meta", "description": "refs is a master directory that bundles 2 subdirectories: json-schema-2019-09 and json-schema-2020-12.\nAt the top level, 'json-schema-2019-09' hosts 1 child directories: meta.\nIn nested path 'json-schema-2019-09 / meta', 'meta' awaits content.\nIn the root directory, 'json-schema-2020-12' has 1 folders: meta.\nAt level 2, in directory path 'json-schema-2020-12 \u2192 meta', The 'meta' data structure remains unused.\n"}