<commit_before>import re


class TocGenerator:

    def generate_toc(marked_tree):
        regex = re.compile(r'[^\w]+')
        toc = []
        for item in marked_tree:
            if item['type'] == 'heading':
                t = 'header-' + regex.sub('-', item['text']).lower()
                c = item.copy()
                c.update({'id': t})
                toc.append(c)<commit_msg>fix: Incorrect heading id generation in ToC<commit_after>import re


class TocGenerator:

    def generate_toc(marked_tree):
        regex = re.compile(r'[^A-Za-z]+')
        toc = []
        for item in marked_tree:
            if item['type'] == 'heading':
                t = 'header-' + regex.sub('-', item['text']).lower()
                c = item.copy()
                c.update({'id': t})
                toc.append(c)
{'fraction_non_alphanumeric': 0.16176470588235295, 'fraction_numerical': 0.0, 'mean_word_length': 1.705298013245033, 'pattern_counts': {'":': 0, '<': 3, '<?xml version=': 0, '>': 3, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '5435674', 'n_tokens_mistral': 269, 'n_tokens_neox': 244, 'n_words': 55}