Lua filter that allows passing obsidian/github callouts as quarto native in quarto >1.3

obsidian-callouts.lua

local stringify = (require "pandoc.utils").stringify
-- idea aken from https://forum.obsidian.md/t/rendering-callouts-similarly-in-pandoc/40020/6 and modified to work with Quarto 1.3

function BlockQuote(el)

    local start = el.content[1]

    if (start.t == "Para" and start.content[1].t == "Str" and
        start.content[1].text:match("^%[!%w+%][-+]?$")) then
        local firstline = stringify(start.content[1])
        local  _, _, ctype = firstline:find("%[!(%w+)%]")
        local titlevar =stringify(start.content):match("^%[!%w+%](.-)$")
        el.content:remove(1)
        -- Create Quarto callout
        return quarto.Callout({
          type = ctype:lower(),
          title = titlevar,
          content = el.content
        })
    else
        return el
    end
end
    end
end

got this error lua:24: <eof> expected near 'end' which went away after removing the last two lines with the two extra ends