<commit_before><commit_msg>Add example of Fast::Rewriter<commit_after>
rewriter = Fast::Rewriter.new
rewriter.ast = Fast.ast("a = 1")
rewriter.search ='(lvasgn _ ...)'
rewriter.replacement =  -> (node) { replace(node.location.name, 'variable_renamed') }
puts rewriter.rewrite!
{'fraction_non_alphanumeric': 0.16666666666666666, 'fraction_numerical': 0.0036231884057971015, 'mean_word_length': 6.102564102564102, 'pattern_counts': {'":': 0, '<': 3, '<?xml version=': 0, '>': 4, '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': '6245240', 'n_tokens_mistral': 99, 'n_tokens_neox': 95, 'n_words': 17}