Module:string/charsetEscape

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local gsub = string.gsub  local chars local function get_chars() chars, get_chars = { ["\000"] = "%z", ["%"] = "%%", ["-"] = "%-", ["]"] = "%]", ["^"] = "%^", }, nil return chars end  --[==[Escapes the magic characters used in pattern character sets: {%-]^}, and converts the null character to {%z}.]==] return function(str) return (gsub(str, "[%z%%%-%]^]", chars or get_chars())) end