prompt: Your task is to convert an English description into an ASCII tree format using this style:
  ```
  [lang]
   +--@modal
   |   +--(.)feed
   |   `--(.)photos
   |       `--[id]
   +--feed
   `--photos
       `--[id]
  ```
  
  Convert this description:
  
  ignore is a source directory that features 2 subdirectories: __snapshots__ and semi.
  At the main level, The '__snapshots__' directory has no content.
  In the root directory, 'semi' retains 1 folders: __snapshots__.
  At level 2, in directory path 'semi → __snapshots__', The '__snapshots__' storage space has nothing inside.
  Back to the top level.
  
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "ignore\n +--__snapshots__\n `--semi\n     `--__snapshots__", "description": "ignore is a source directory that features 2 subdirectories: __snapshots__ and semi.\nAt the main level, The '__snapshots__' directory has no content.\nIn the root directory, 'semi' retains 1 folders: __snapshots__.\nAt level 2, in directory path 'semi \u2192 __snapshots__', The '__snapshots__' storage space has nothing inside.\nBack to the top level.\n"}