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-- v2.13 CORPUS-IV: %b balanced match. print(string.match("(a(b)c)", "%b()")) print(string.match("f(x, g(y))", "%b()")) print(string.match("[a[b]c]", "%b[]")) print(string.match("no parens", "%b()")) print(string.gsub("f(1) g(2)", "%b()", "()"))