old_contents: import inspect
  
  from .builder import SpellingBuilder
  from .directive import SpellingDirective
  
  
  def setup(app):
      # If we are running inside the test suite, "app" will be a module.
      if inspect.ismodule(app):
          return
      app.info('Initializing Spelling Checker')
      app.add_builder(SpellingBuilder)
      # Register the 'spelling' directive for setting parameters within
      # a document
      app.add_directive('spelling', SpellingDirective)
      # Report guesses about correct spelling
      app.add_config_value('spelling_show_suggestions', False, 'env')
      # Set the language for the text
      app.add_config_value('spelling_lang', 'en_US', 'env')
      # Set the language for the tokenizer
      app.add_config_value('tokenizer_lang', 'en_US', 'env')
      # Set a user-provided list of words known to be spelled properly
      app.add_config_value('spelling_word_list_filename',
                           'spelling_wordlist.txt',
                           'env')
      # Assume anything that looks like a PyPI package name is spelled properly
      app.add_config_value('spelling_ignore_pypi_package_names', False, 'env')
      # Assume words that look like wiki page names are spelled properly
      app.add_config_value('spelling_ignore_wiki_words', True, 'env')
      # Assume words that are all caps, or all caps with trailing s, are
      # spelled properly
      app.add_config_value('spelling_ignore_acronyms', True, 'env')
      # Assume words that are part of __builtins__ are spelled properly
      app.add_config_value('spelling_ignore_python_builtins', True, 'env')
      # Assume words that look like the names of importable modules are
      # spelled properly
      app.add_config_value('spelling_ignore_importable_modules', True, 'env')
      # Add any user-defined filter classes
      app.add_config_value('spelling_filters', [], 'env')
      return
  
new_contents: import inspect
  
  from .builder import SpellingBuilder
  from .directive import SpellingDirective
  
  
  def setup(app):
      # If we are running inside the test suite, "app" will be a module.
      if inspect.ismodule(app):
          return
      app.info('Initializing Spelling Checker')
      app.add_builder(SpellingBuilder)
      # Register the 'spelling' directive for setting parameters within
      # a document
      app.add_directive('spelling', SpellingDirective)
      # Report guesses about correct spelling
      app.add_config_value('spelling_show_suggestions', False, 'env')
      # Set the language for the text
      app.add_config_value('spelling_lang', 'en_US', 'env')
      # Set the language for the tokenizer
      app.add_config_value('tokenizer_lang', 'en_US', 'env')
      # Set a user-provided list of words known to be spelled properly
      app.add_config_value('spelling_word_list_filename',
                           'spelling_wordlist.txt',
                           'env')
      # Assume anything that looks like a PyPI package name is spelled properly
      app.add_config_value('spelling_ignore_pypi_package_names', False, 'env')
      # Assume words that look like wiki page names are spelled properly
      app.add_config_value('spelling_ignore_wiki_words', True, 'env')
      # Assume words that are all caps, or all caps with trailing s, are
      # spelled properly
      app.add_config_value('spelling_ignore_acronyms', True, 'env')
      # Assume words that are part of __builtins__ are spelled properly
      app.add_config_value('spelling_ignore_python_builtins', True, 'env')
      # Assume words that look like the names of importable modules are
      # spelled properly
      app.add_config_value('spelling_ignore_importable_modules', True, 'env')
      # Add any user-defined filter classes
      app.add_config_value('spelling_filters', [], 'env')
      return {"parallel_read_safe": True}
  
subject: Mark the extension as safe for parallel reading