function wide(el)
    local els = pandoc.List()

    els:insert(pandoc.RawBlock("html", "</div>"))
    if pcall(function() return #el end) then
        els:extend(el)
    else
        els:insert(el)
    end
    els:insert(pandoc.RawBlock("html", "<div class=\"l-container l-container--narrow u-ml-0\">"))

    return els
end

function dump(o)
    if type(o) == 'table' then
        local s = '{ '
        for k, v in pairs(o) do
            if type(k) ~= 'number' then k = '"' .. k .. '"' end
            s = s .. '[' .. k .. '] = ' .. dump(v) .. ','
        end
        return s .. '} '
    else
        return tostring(o)
    end
end

function string.split(str, sep)
    sep = sep or '%s'

    local parts = pandoc.List()

    for field, s in str:gmatch("([^" .. sep .. "]*)(" .. sep .. "?)") do
        parts:insert(field)
        if s == "" then return parts end
    end
end

return {
    wide = wide, dump = dump
}