old_contents: """
      scripts/gen_mapfiles.py
      ~~~~~~~~~~~~~~~~~~~~~~~
  
      Regenerate mapping files.
  
      :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
      :license: BSD, see LICENSE for details.
  """
  
  from importlib import import_module
  from pathlib import Path
  import re
  import sys
  
  top_src_dir = Path(__file__).parent.parent
  pygments_package = top_src_dir / 'pygments'
  sys.path.insert(0, pygments_package.parent.resolve())
  
  from pygments.util import docstring_headline
  
  def main():
      for key in ['lexers', 'formatters']:
          lines = []
          for file in (pygments_package / key).glob('[!_]*.py'):
              module_name = '.'.join(file.relative_to(pygments_package.parent).with_suffix('').parts)
              print(module_name)
              module = import_module(module_name)
              for obj_name in module.__all__:
                  obj = getattr(module, obj_name)
                  desc = (module_name, obj.name, tuple(obj.aliases), tuple(obj.filenames))
                  if key == 'lexers':
                      desc += (tuple(obj.mimetypes),)
                  elif key == 'formatters':
                      desc += (docstring_headline(obj),)
                  else:
                      assert False
                  lines.append(f'    {obj_name!r}: {desc!r},')
          # Sort to make diffs minimal.
          lines.sort()
          new_dict = '\n'.join(lines)
          content = f'''# Automatically generated by scripts/gen_mapfiles.py.
  # DO NOT EDIT BY HAND; run `make mapfiles` instead.
  
  {key.upper()} = {{
  {new_dict}
  }}
  '''
          (pygments_package / key / '_mapping.py').write_text(content, encoding='utf8')
          print(f'=== {len(lines)} {key} processed.')
  
  if __name__ == '__main__':
      main()
  
new_contents: """
      scripts/gen_mapfiles.py
      ~~~~~~~~~~~~~~~~~~~~~~~
  
      Regenerate mapping files.
  
      :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
      :license: BSD, see LICENSE for details.
  """
  
  from importlib import import_module
  from pathlib import Path
  import re
  import sys
  
  top_src_dir = Path(__file__).parent.parent
  pygments_package = top_src_dir / 'pygments'
  sys.path.insert(0, str(pygments_package.parent.resolve()))
  
  from pygments.util import docstring_headline
  
  def main():
      for key in ['lexers', 'formatters']:
          lines = []
          for file in (pygments_package / key).glob('[!_]*.py'):
              module_name = '.'.join(file.relative_to(pygments_package.parent).with_suffix('').parts)
              print(module_name)
              module = import_module(module_name)
              for obj_name in module.__all__:
                  obj = getattr(module, obj_name)
                  desc = (module_name, obj.name, tuple(obj.aliases), tuple(obj.filenames))
                  if key == 'lexers':
                      desc += (tuple(obj.mimetypes),)
                  elif key == 'formatters':
                      desc += (docstring_headline(obj),)
                  else:
                      assert False
                  lines.append(f'    {obj_name!r}: {desc!r},')
          # Sort to make diffs minimal.
          lines.sort()
          new_dict = '\n'.join(lines)
          content = f'''# Automatically generated by scripts/gen_mapfiles.py.
  # DO NOT EDIT BY HAND; run `make mapfiles` instead.
  
  {key.upper()} = {{
  {new_dict}
  }}
  '''
          (pygments_package / key / '_mapping.py').write_text(content, encoding='utf8')
          print(f'=== {len(lines)} {key} processed.')
  
  if __name__ == '__main__':
      main()
  
subject: convert Path to str before adding to sys.path (#2223)