prompt: Your task is to convert the following English description into an ASCII tree format.
  
  @packages is a top-level directory that gathers 2 subdirectories: a and b.
  At the top level, 'a' shelters 1 nested folders: nested-a.
  Within directory hierarchy 'a / nested-a', The 'nested-a' data structure is vacant.
  At the top level, 'b' stores 1 directories: nested-b.
  Within directory hierarchy 'b / nested-b', Inside 'nested-b', you'll find it is blank.
  
  
  Format your response in this style:
  ```
  samples
   +--basic
   |   `--_expected
   +--missing-dependency-resolution
   +--missing-entry-resolution
   +--missing-load
   +--renormalizes-external-paths
   |   `--_expected
   `--supports-hashes
       `--_expected
  ```
  
  Provide your answer wrapped in <ascii_formatted> tags.
verification_info: {"ground_truth": "@packages\n +--a\n |   `--nested-a\n `--b\n     `--nested-b", "description": "@packages is a top-level directory that gathers 2 subdirectories: a and b.\nAt the top level, 'a' shelters 1 nested folders: nested-a.\nWithin directory hierarchy 'a / nested-a', The 'nested-a' data structure is vacant.\nAt the top level, 'b' stores 1 directories: nested-b.\nWithin directory hierarchy 'b / nested-b', Inside 'nested-b', you'll find it is blank.\n"}