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

obsidian-callouts.lua

-- obsidian-callouts.lua
-- Render Obsidian / GitHub-style callouts as native Quarto callouts.
--
--   > [!note] Optional title
--   > body...
--   > [!warning]-   <- trailing - / + sets collapsed / expanded
--
-- Works whether or not there is a blank `>` line between the title line
-- and the body. Requires Quarto >= 1.3 (uses the quarto.Callout API).
-- Put it in your project's _quarto.yml under `filters:`.

local stringify = pandoc.utils.stringify

local type_map = {
  note = "note", info = "note", todo = "note", abstract = "note",
  summary = "note", tldr = "note", example = "note", quote = "note",
  tip = "tip", hint = "tip", success = "tip", check = "tip",
  done = "tip", question = "tip", help = "tip", faq = "tip",
  warning = "warning", attention = "warning",
  caution = "caution", fail = "caution", missing = "caution",
  danger = "caution", error = "caution", bug = "caution",
  important = "important",
}

function BlockQuote(el)
  local first = el.content[1]
  if not first or first.t ~= "Para" then return el end

  local marker = first.content[1]
  if not marker or marker.t ~= "Str" then return el end

  -- marker token: [!type] with optional trailing - or + (fold state)
  local ctype, fold = marker.text:match("^%[!(%w+)%]([-+]?)$")
  if not ctype then return el end

  -- inlines of the marker paragraph, minus the "[!type]" token
  local inlines = first.content:clone()
  table.remove(inlines, 1)

  -- With no blank `>` line, Pandoc folds the title line and the body into
  -- one paragraph joined by a SoftBreak. Split at the first line break:
  -- before it is the title, after it is the first body paragraph.
  local title_inlines, rest_inlines = pandoc.List({}), pandoc.List({})
  local seen_break = false
  for _, inl in ipairs(inlines) do
    if not seen_break and (inl.t == "SoftBreak" or inl.t == "LineBreak") then
      seen_break = true
    elseif seen_break then
      rest_inlines:insert(inl)
    else
      title_inlines:insert(inl)
    end
  end

  local title = stringify(title_inlines):gsub("^%s+", ""):gsub("%s+$", "")

  -- rebuild the callout body
  if #rest_inlines > 0 then
    el.content[1] = pandoc.Para(rest_inlines)   -- trailing text on marker line
  else
    table.remove(el.content, 1)                 -- marker line had only the title
  end

  return quarto.Callout({
    type = type_map[ctype:lower()] or "note",
    title = (title ~= "" and title) or nil,
    collapse = (fold == "-" and true) or (fold == "+" and false) or nil,
    content = el.content,
  })
end

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