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-- v2.12 CORPUS-III: gsub backref + repetition. print(string.gsub("abcabc", "(a)(b)(c)", "%3%2%1")) print(string.gsub("hello world", "(%w+) (%w+)", "%2 %1")) print(string.gsub("aaaa", "aa", "<X>")) -- limit=0 means no replacement print(string.gsub("aaa", "a", "b", 0))