docs: def _iter_full_paths(path_list):
      """
      Iterates over all paths that are in a directory and its subdirectory, returning 
      fully-specified paths.
      """
      for path in path_list:
          if not os.path.isdir(path):
              full_path = os.path.realpath(path)
              yield path
          else:
              for root, dirs, filenames in os.walk(path):
                  for filename in filenames:
                      full_path = os.path.realpath(os.path.join(root, filename))
                      yield full_path