Recognize undos map

I tried to match a format like string like this: "This is a {{{arg}}} literal". I wanted it to replace the escaped character "{" using map, such that my end result would be: "This is a {", "arg", "} literal"

Below the code I use to parse the literal, ie. "This is a {{" -> "This is a {"

recognize(many1(alt((
        map(tag("{{"), |_| "{"),
        map(tag("}}"), |_| "}"),
        is_not("{"),
    )))).parse(input);

The part without recognize would output: ["This is a ", "{"] Recognize turns it into "This is a {{"

Version: 8