<commit_before>List of issues addressed or tested with new version which should be closed

#128, #129, #131, #144, #175, #176, #177, #178, #179, #180

Additionally, made changes to the default ToHtmlSerializer and Printer to output prettier HTML for dd, dt, li, p tags to break up very long lines.
<commit_msg>add issuelist.md<commit_after>List of issues addressed or tested with new version which should be closed

#128, #129, #131, #144, #175, #176, #177, #178, #179, #180

Additionally, made changes to the default ToHtmlSerializer and Printer to output prettier HTML for dd, dt, li, p tags to break up very long lines.

Added testAlt and testASTAlt to AbstractPegDownSpec so that expectations for tests that test's expectation file can have a suffix added. Used for running multiple parser configurations on the same source but having different expected results. 
{'fraction_non_alphanumeric': 0.06689734717416378, 'fraction_numerical': 0.06920415224913495, 'mean_word_length': 5.06993006993007, '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': '4458222', 'n_tokens_mistral': 278, 'n_tokens_neox': 232, 'n_words': 132}