Skip doc files that don't have common file structure

#!/usr/bin/env python3

# Utility script to fix headers in doc pages and generate "Accelerator Styles" portion

import os

import shutil

import re

import argparse

    styles = []

    headings = {}

    new_file = f"{orig_file}.tmp"

    found_syntax = False

    with open(orig_file, 'r') as reader, open(new_file, 'w') as writer:

        for line in reader:

            if line.startswith("Syntax"):

                found_syntax = True

                break

            m = index_pattern.match(line)

                elif style not in headings[base_name]:

                    headings[base_name].append(style)

        if found_syntax:

            # write new header

            for s in styles:

                print(f".. index:: {command_type} {s}", file=writer)

            for line in reader:

                print(line, end="", file=writer)

    if found_syntax:

        # override original file

        shutil.move(new_file, orig_file)

    else:

        os.remove(new_file)